CN102868614B - Message forwarding method in TRILL network and route-bridge - Google Patents
Message forwarding method in TRILL network and route-bridge Download PDFInfo
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- CN102868614B CN102868614B CN201210337378.1A CN201210337378A CN102868614B CN 102868614 B CN102868614 B CN 102868614B CN 201210337378 A CN201210337378 A CN 201210337378A CN 102868614 B CN102868614 B CN 102868614B
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Abstract
The invention discloses the message forwarding method in a kind of TRILL network and route-bridge: entrance RB and outlet RB be that local port distributes local unique label, learn in local mac address list item by the MAC Address of local host and for the label of local port distribution; Entrance RB searches MAC Address list item corresponding to the target MAC (Media Access Control) address of the message to be forwarded sent by local host in local mac address table, treat to E-Packet according to lookup result and carry out comprising the TRILL encapsulation of entrance RB, ingress label and outlet RB, outlet label, the TRILL message after encapsulation is sent to outlet RB; TRILL message is carried out TRILL decapsulation by outlet RB, carries out the study of internal layer source MAC, internal layer source MAC, entrance RB and ingress label is learnt in local mac address list item, and forwards the message after decapsulation according to outlet label.Apply method of the present invention and route-bridge, foundation label can be realized to the forwarding of message, reduce searching mac address table, reduce the complexity of message repeating.
Description
Technical field
The application relates to communication technical field, the message forwarding method particularly in a kind of multi-link transparent interconnection (TRILL, TransparentInterconnection of Lots of Links) network and route-bridge.
Background technology
TRILL is articulamentum (L2) network standard that Internet Engineering Task group (IETF, Internet Engineering Task Force) is recommended, for solving the deficiency of large-scale data center Spanning-Tree Protocol (STP, Spanning Tree Protocol).In L2 network, STP avoids loop by blocking redundant link, but also result in the waste of redundant link bandwidth simultaneously, TRILL then passes through intermediate system intermediate system (ISIS, Intermediate system tointermediate system) Routing Protocol introducing L2 network, not only solve L2 loop problem, but also redundant path and load balancing can be supported.
In TRILL network, the equipment running TRILL protocol is called route-bridge (RB, Router Bridge), and this RB is the synthesis of switch and router feature.Fig. 1 gives the process schematic of existing unicast message retransmission method, and as shown in Figure 1, send unicast message for host C to host A, this unicast message repeating process can comprise:
A, host C send unicast message, carry out common two layers of forwarding by switch to this unicast message;
The function of exchange module of b, RB2 is carried out common mac learning to the unicast message that switch sends and searches, the list item outbound port finding host A is 2, and exporting RB is after RB4, carries out TRILL encapsulation, be sent to routing function module from port 2 to this unicast message; Routing function module carries out TRILL route querying, and the down hop finding RB4 is RB1, searches MAC Address F and control VLAN200 that adjacency list obtains RB1, after encapsulating, unicast message is sent to RB1;
C, RB1 carry out TRILL route querying repeating process to the unicast message received, and are sent to RB4;
D, RB4 find that outlet RB is self, then carry out decapsulation process to the unicast message received, peel off TRILL head, carry out interior layer MAC address and search, obtain outbound port, and then unicast message is sent to host A.
Can be found out by above-mentioned analysis, existing when TRILL network repeating unicast message, all to carry out MAC Address at entrance RB and outlet RB and search and obtain outbound port, and then forward this unicast message according to the outbound port found.But because mac address table is very large, the process of thus searching MAC Address may be very long, not only extends the message repeating time, and improve forwarding complexity.
Summary of the invention
In view of this, the invention provides the message forwarding method in a kind of TRILL network, foundation label can be realized to the forwarding of message, reduce searching mac address table, reduce the complexity of message repeating.
Present invention also offers a kind of route-bridge, foundation label can be realized to the forwarding of message, reduce searching mac address table, reduce the complexity of message repeating.
In order to achieve the above object, the technical scheme that the present invention proposes is:
A message forwarding method in multi-link transparent interconnection TRILL network, the method is applied to the entrance RB in TRILL network, comprising:
Entrance RB is that each local port distributes local unique label, learns in local mac address list item by the label that the MAC Address of local host and the local port that sends message for receiving local host are distributed;
After entrance RB receives the message to be forwarded sent by local host, the MAC Address list item that the target MAC (Media Access Control) address of message to be forwarded is corresponding is searched in local mac address table, treat to E-Packet according to lookup result and carry out comprising the TRILL encapsulation of entrance RB, ingress label and outlet RB, outlet label, the TRILL message after encapsulation is sent to outlet RB; The label of described ingress label to be entrance RB the be port assignment receiving described message to be forwarded, the result that described outlet label is searched according to target MAC (Media Access Control) address by entrance RB is determined;
Described outlet label is used to indicate outlet RB and forwards the TRILL message after decapsulation according to this outlet label after completing the decapsulation to described TRILL message.
When the message to be forwarded that described entrance RB receives is known unicast message, then described outlet label is switch label type, and described outlet RB carries out forwarding according to outlet label to the message after decapsulation and comprises: the port of the message after decapsulation from the outlet RB corresponding to outlet label forwards by outlet RB;
When the message to be forwarded that described entrance RB receives is unknown unicast message, described outlet label is unicast label type, then described outlet RB carries out forwarding to the message after decapsulation comprise according to outlet label: the message after decapsulation is carried out target MAC (Media Access Control) address and searches by outlet RB, if find corresponding MAC Address, then from the port repeat of correspondence; If do not found, then carry out local port and flood;
When the message to be forwarded that described entrance RB receives is known multicast message, described outlet label is multicast label type, then described outlet RB carries out forwarding to the message after decapsulation comprise according to outlet label: the message after decapsulation is carried out multicast group and searches by outlet RB, carries out multicast replication forwarding according to lookup result to message;
When the message to be forwarded that described entrance RB receives be unknown multicast packets or broadcasting packet time, described outlet label is broadcast tag types, then described outlet RB carries out forwarding to the message after decapsulation comprise according to outlet label: export RB and carry out local port to the message after decapsulation and flood.
When MAC Address is moved, described method also comprises: entrance RB, when this locality has detected that main frame is moved into, upgrades the label of the MAC address entries association that in local mac address table, this main frame of moving into is corresponding.
When the port cisco unity malfunction of the described message to be forwarded of reception of entrance RB, the method comprises further:
Entrance RB sends tag deactivation message to other each RB, and described tag deactivation message comprises the label of the label Nickname of entrance RB and the port assignment for described reception message to be forwarded;
It is unicast label that described tag deactivation message is used to indicate the RB that receives tag deactivation message by the tag update in the MAC Address list item of the label Nickname and same label that comprise identical entrance RB in local mac address table.
A message forwarding method in multi-link transparent interconnection TRILL network, the method is applied to the outlet RB in TRILL network, comprising:
Outlet RB is that each local port distributes local unique label, learns in local mac address list item by the label that the MAC Address of local host and the local port that sends message for receiving local host are distributed;
Outlet RB receive by entrance RB send comprise entrance RB, ingress label, outlet RB and outlet label TRILL message after, carry out TRILL decapsulation, and carry out the study of internal layer source MAC, internal layer source MAC, entrance RB and ingress label are learnt in local mac address list item; The label of the port assignment of described ingress label to be entrance RB be message that Receiving Host sends, described outlet label is the determined label of result that entrance RB searches according to target MAC (Media Access Control) address;
Outlet RB forwards the message after decapsulation according to outlet label.
When described outlet label is switch label type, described outlet RB carries out forwarding according to outlet label to the message after decapsulation and comprises: the port of the message after decapsulation from the outlet RB corresponding to outlet label forwards by outlet RB;
When described outlet label is unicast label type, then described outlet RB carries out forwarding to the message after decapsulation comprise according to outlet label: the message after decapsulation is carried out target MAC (Media Access Control) address and searches by outlet RB, if find corresponding MAC Address, then from the port repeat of correspondence; If do not found, then carry out local port and flood;
When described outlet label is multicast label type, then described outlet RB carries out forwarding to the message after decapsulation comprise according to outlet label: the message after decapsulation is carried out multicast group and searches by outlet RB, carries out multicast replication forwarding according to lookup result to message;
When described outlet label is broadcast tag types, then described outlet RB carries out forwarding to the message after decapsulation comprise according to outlet label: export RB and carry out local port to the message after decapsulation and flood.
When MAC Address is moved, described outlet RB carries out decapsulation to the TRILL message received, and when carrying out the study of internal layer source MAC, the method also comprises:
RB in the MAC Address list item that the internal layer source MAC in this TRILL message in outlet RB judgement local mac address table is corresponding changes, then use the RB in the MAC Address list item that in the renewal of the entrance RB in message local mac address table, this source MAC is corresponding; And/or,
Label in the MAC Address list item that the internal layer source MAC in this TRILL message in outlet RB judgement local mac address table is corresponding changes, then use the label in the MAC Address list item that in the renewal of the ingress label in message local mac address list item, this source MAC is corresponding.
The method comprises further:
When exporting RB and receiving the tag deactivation message of the label Nickname comprising entrance RB that entrance RB sends and label corresponding to the port of cisco unity malfunction, check local mac address list item, when the Nickname of RB in local mac address list item is the Nickname of entrance RB in tag deactivation message and comprises the label in tag deactivation message in local mac address list item, be unicast label by the tag update in local mac address list item.
A route-bridge in multi-link transparent interconnection TRILL network, this route-bridge is the entrance route-bridge RB receiving message, and this route-bridge comprises:
Tag processes unit, for being the local unique label of each port assignment; By the MAC Address of local host and for receive local host send message local port distribute label learn in local mac address list item;
Message receiving element, for receiving the message to be forwarded sent by local host;
Message encapsulation unit, the MAC Address list item that the target MAC (Media Access Control) address for searching message to be forwarded in local mac address table is corresponding, treats to E-Packet according to lookup result and carries out comprising the TRILL encapsulation of entrance RB, ingress label and outlet RB, outlet label; The label of described ingress label to be entrance RB the be port assignment receiving described message to be forwarded, the result that described outlet label is searched according to target MAC (Media Access Control) address is determined;
Described packet sending unit, sends to outlet RB for the message after described message encapsulation unit is carried out TRILL encapsulation, forwards according to object MAC and outlet label to make outlet RB to message.
When the message to be forwarded that the main frame that described message receiving element receives sends is known unicast message, the outlet label of the TRILL message of described message encapsulation unit encapsulation is switch label type, and the port of the message after decapsulation from the outlet RB corresponding to outlet label forwards by described interactive tag instruction outlet RB;
When the message to be forwarded that the main frame that described message receiving element receives sends is unknown unicast message, the outlet label of the TRILL message of described message encapsulation unit encapsulation is unicast label type, described unicast label instruction outlet RB carries out target MAC (Media Access Control) address to the message after decapsulation and searches, if find corresponding MAC Address, then from the port repeat of correspondence; If do not found, then carry out local port and flood;
When the message to be forwarded that the main frame that described message receiving element receives sends is known multicast message, the outlet label of the TRILL message of described message encapsulation unit encapsulation is multicast label type, described multicast label instruction outlet RB carries out multicast group to the message after decapsulation and searches, and carries out multicast replication forwarding according to lookup result to message;
When the message to be forwarded that main frame that described message receiving element receives sends be unknown multicast packets or broadcasting packet time, the outlet label of the TRILL message of described message encapsulation unit encapsulation is multicast label type, and described multicast label instruction outlet RB carries out local port to the message after decapsulation and floods.
This route-bridge also comprises tag update unit, for when this locality has detected that main frame is moved into, upgrades the label of the MAC address entries association that in local mac address table, this main frame of moving into is corresponding.
This route-bridge also comprises invalid transmitting element, during port cisco unity malfunction for the reception message when described message receiving element, tag deactivation message is sent to other each RB, described tag deactivation message be used to indicate each RB receiving tag deactivation message at the Nickname judging the entrance RB carried during the Nickname of RB in local mac address list item is as tag deactivation message and comprise the label carried in tag deactivation message in this local mac address list item time, be unicast label by the tag update in local mac address list item.
A route-bridge in multi-link transparent interconnection TRILL network, this route-bridge is the outlet route-bridge RB E-Packeted, and this route-bridge comprises:
Tag processes unit, for being the local unique label of each port assignment; By the MAC Address of local host and for receive local host send message local port distribute label learn in local mac address list item;
Message receiving element, for receive by entrance RB send carry out comprising entrance RB, ingress label and outlet RB by entrance RB, the TRILL of outlet label encapsulate after TRILL message, the label of the port assignment of described ingress label to be entrance RB be message that Receiving Host sends, the result that described outlet label is searched according to target MAC (Media Access Control) address by entrance RB is determined;
Message decapsulation unit, carries out TRILL decapsulation for the message received described message receiving element;
Address learning unit, for carrying out the study of internal layer source MAC to the message after the decapsulation of message decapsulation unit, learns in local mac address list item by internal layer source MAC, entrance RB and ingress label;
Message repeating unit, for forwarding the message after the decapsulation of described message decapsulation unit according to outlet label.
When the outlet label in the TRILL message that described message receiving element receives is switch label type, described message repeating unit is used for the message after decapsulation to forward from the port corresponding to outlet label;
When the outlet label in the TRILL message that described message receiving element receives is unicast label type, described message repeating unit is used for that the message after decapsulation is carried out target MAC (Media Access Control) address and searches, if find corresponding MAC Address, then from the port repeat of correspondence; If do not found, then carry out local port and flood;
When the outlet label in the TRILL message that described message receiving element receives is multicast label type, described message repeating unit is used for that the message after decapsulation is carried out multicast group and searches, and carries out multicast replication forwarding according to lookup result to message;
When the outlet label in the TRILL message that described message receiving element receives is for broadcast tag types, described message repeating unit is used for that the message after decapsulation is carried out local port and floods.
Described address learning unit also for:
When judging that the RB in the MAC Address list item that the internal layer source MAC in local mac address table in this TRILL message is corresponding changes, use the RB in the MAC Address list item that in the renewal of the entrance RB in message local mac address table, this source MAC is corresponding; And/or,
When judging that the label in the MAC Address list item that the internal layer source MAC in local mac address table in this TRILL message is corresponding changes, use the label in the MAC Address list item that in the renewal of the ingress label in message local mac address table, this source MAC is corresponding.
This route-bridge also comprises invalid receiver unit and tag update unit, wherein,
Described invalid receiver unit, during port cisco unity malfunction for the reception message as entrance RB, receives the tag deactivation message sent by entrance RB, and described tag deactivation message comprises the Nickname of entrance RB and the label for this port assignment;
Described tag update unit, for after described invalid receiver unit receives tag deactivation message, check local mac address table, as the Nickname judging the entrance RB carried during the Nickname of RB in local mac address list item is as tag deactivation message and when comprising the label carried in tag deactivation message in this local mac address list item, be unicast label by the tag update in local mac address list item.
In sum, message forwarding method in TRILL network of the present invention, distribute local unique label by being respectively local port by entrance RB and outlet RB, by the MAC Address of local host and for receive local host send message local port distribute label learn in local mac address list item, after entrance RB receives the message to be forwarded sent by local host, the MAC Address list item that the target MAC (Media Access Control) address of message to be forwarded is corresponding is searched in local mac address table, treat to E-Packet according to lookup result and carry out comprising entrance RB, ingress label and outlet RB, the TRILL encapsulation of outlet label, TRILL message after encapsulation is sent to outlet RB, entrance RB is comprised by what receive by outlet RB, ingress label, the TRILL message of outlet RB and outlet label carries out TRILL decapsulation, and carry out the study of internal layer source MAC, by internal layer source MAC, entrance RB and ingress label learn in local mac address list item, and according to outlet label, the message after decapsulation is forwarded.Due to the corresponding relation between the port that the present invention sets up label and Receiving Host message, after RB carries out the study of source MAC, the message repeating based on label can be realized, thus decrease MAC Address and search, therefore, the inventive method not only avoid the time waste problem that may cause owing to searching large mac address table, but also reduces forwarding complexity.
Accompanying drawing explanation
Fig. 1 is the process schematic of unicast message retransmission method in existing TRILL network;
Fig. 2 is the workflow diagram of message forwarding method in TRILL network of the present invention;
Fig. 3 is the TRILL message structure schematic diagram after the present invention expands;
Fig. 4 is the structural representation of route-bridge embodiment one of the present invention;
Fig. 5 is the structural representation of route-bridge embodiment two of the present invention.
Embodiment
In order to solve the technical problem that the present invention proposes, the specific implementation of scheme of the present invention comprises:
Entrance RB is that each local port distributes local unique label, learns in local mac address list item by the label that the MAC Address of local host and the local port that sends message for receiving local host are distributed; After entrance RB receives the message to be forwarded sent by local host, the MAC Address list item that the target MAC (Media Access Control) address of message to be forwarded is corresponding is searched in local mac address table, treat to E-Packet according to lookup result and carry out comprising the TRILL encapsulation of entrance RB, ingress label and outlet RB, outlet label, the TRILL message after encapsulation is sent to outlet RB; The label of described ingress label to be entrance RB the be port assignment receiving described message to be forwarded, the result that described outlet label is searched according to target MAC (Media Access Control) address by entrance RB is determined; Described outlet label is used to indicate outlet RB and forwards the TRILL message after decapsulation according to this outlet label after completing the decapsulation to described TRILL message;
Outlet RB is that each local port distributes local unique label, learns in local mac address list item by the label that the MAC Address of local host and the local port that sends message for receiving local host are distributed; Outlet RB receive by entrance RB send comprise entrance RB, ingress label, outlet RB and outlet label TRILL message after, carry out TRILL decapsulation, and carry out the study of internal layer source MAC, internal layer source MAC, entrance RB and ingress label are learnt in local mac address list item; The label of the port assignment of described ingress label to be entrance RB be message that Receiving Host sends, described outlet label is the determined label of result that entrance RB searches according to target MAC (Media Access Control) address; Outlet RB forwards the message after decapsulation according to outlet label.
For making the object, technical solutions and advantages of the present invention clearly, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Fig. 2 is the workflow diagram of message forwarding method in TRILL network of the present invention, and as shown in Figure 2, this flow process comprises:
Step 201: definition tag types, each RB in TRILL network needs for each local port distributes local unique label.
In the present invention, when each RB starts, have the label of uniqueness can to local each port assignment this locality;
The structure of the present invention to TRILL message is expanded, and in TRILL message, increase the cell of ingress label and outlet label, the TRILL message structure example after expansion as shown in Figure 3.In a preferred embodiment of the invention, at the exit label Egress Nickname of TRILL message and the outlet of the interpolation below label E gress Label and ingress label Ingress Label of entry name Ingress Nickname.Inbound port when wherein Ingress Label cell represents that message enters entrance RB can only be switch label; Egress Label cell represents the outbound port information that message is corresponding when sending message from outlet RB, and the information of outbound port is disclosed by label value, namely can know the type of label according to the span of label, performs corresponding process according to the type of label.
Label is divided into five classes according to type of message by the present invention, and defines value or the span of dissimilar label, and described five kinds of tag types are defined as follows:
Broadcast label (such as value is 0xFFFFFFFF): representing that outlet RB is when receiving the message with the outlet label of the type, needing to carry out local port at outlet RB and flooding, copying the message received by transmission from all local ports;
Multicast label (such as value is 0xFFFFFFFE): represent that outlet RB is when receiving the message with the outlet label of the type, need to carry out local Layer 2 Multicast group at outlet RB to search, namely according to the internal layer target MAC (Media Access Control) address inquiry multicast mac address table of message, carry out multicast replication according to lookup result to the message received, the outbound port of specifying from multicast mac address list item sends;
Unicast label (such as span is 0xFFFFFFFD): representing that outlet RB is when receiving the message with the outlet label of the type, needing will to carry out two layers, this locality unicast mac address table at outlet RB and searching, forwarding according to lookup result;
Switch label (such as span is 1-0x0FFFFFFC): represent that outlet RB is when receiving the message with the outlet label of the type, directly sends from the local port that this outlet label is corresponding.
Hold sticker (0x00FFFF01-0xFFFFFFF0): retain follow-up use.
Step 202: the label for local port distribution of locally-attached host MAC address and correspondence learns in local mac address list item by each RB.
Each RB in network needs the MAC Address learning the main frame be connected with self, unlike, in the present invention, each RB also needs to learn the label corresponding with local host MAC Address, and the present invention does not limit and adopts which kind of mode or agreement study to comprise local host MAC Address and the label for local port distribution.
In one instantiation, RB is after the message receiving local host transmission, the label that this host MAC address is corresponding with the port receiving the message that this main frame sends associates, and is together learnt in local mac address table by the label of this host MAC address and association.
Step 203: after entrance RB receives the message to be forwarded sent by main frame, entrance RB is according to the object MAC in message to be forwarded, in local mac address table, carry out object MAC search, when needs are forwarded by TRILL tunnel, according to lookup result, TRILL encapsulation is carried out to the message to be forwarded that main frame sends.
When entrance RB encapsulates the message that main frame sends, ingress label in TRILL message is entrance RB receives label corresponding to the port of the message that described main frame sends and entrance RB is the label of this port assignment, the result that outlet label is searched according to object MAC is determined, when finding (representing known) target MAC (Media Access Control) address, described outlet label is the label of port assignment of the outlet RB for receiving message; When searching less than (representing unknown) target MAC (Media Access Control) address, the type of message that described outlet label receives according to entrance RB is determined.
Based on mentioned above principle, determine that the mode exporting label is as follows:
If namely known unicast message finds the unicast message of object MAC, then exporting label is switch label type, and namely exporting label is the label that this locality finds in MAC Address list item;
If namely unknown unicast message does not find the unicast message of object MAC, then exporting label is unicast label type;
If namely unknown multicast packets does not find the multicast message of object MAC, then export label for broadcast tag types;
If namely known multicast message finds the multicast message of object MAC, then exporting label is multicast label type;
If broadcasting packet, then export label for broadcast tag types.
Step 204: carry out TRILL routing table lookup to the TRILL message after described encapsulation, according to the route found, sends to outlet RB by TRILL message.
In this step, after the TRILL message obtained after described encapsulation carries out route querying encapsulation, send to outlet RB by the TRILL message after described route querying encapsulates by middle RB.
Step 205: after outlet RB carries out TRILL decapsulation to the message received, carry out the study of internal layer source MAC, the internal layer source MAC (i.e. the MAC Address of source host) of TRILL message is associated with vpn label and ingress label, the Nickname of the internal layer source MAC of the message after decapsulation and source host MAC Address, entrance RB and ingress label are learnt in local mac list item.
When after execution of step 205, need according to outlet label, message to be forwarded, specifically how to E-Packet and need according to outlet tag types and determine, when outlet label is switch label, perform step 206; When outlet label is unicast label, perform step 207; When outlet label is multicast label, perform step 208; When exporting label for broadcast label, perform step 209.Illustrate message repeating process below:
Step 206: when to export label be switch label, after being forwarded from the port of the outlet RB corresponding to outlet label by the message after carrying out source MAC study by outlet RB, terminate current message forwarding process.
When the message that described entrance RB receives is known unicast message, described outlet label is switch label, be the label of the port assignment of the outlet RB of the message received, then, describedly message is carried out forwarding comprise according to outlet label: the message after carrying out source MAC study forwards from the port of the outlet RB corresponding to outlet label by described outlet RB.
Step 207: when to export label be unicast label, by outlet RB, the message after carrying out source MAC study carried out target MAC (Media Access Control) address and search, after multicast replication forwarding being carried out to message according to lookup result, terminate current message forwarding process.
When the message that described entrance RB receives is unknown unicast message, described outlet label is unicast label, then, describedly message is carried out forwarding comprise according to outlet label: the message after carrying out source MAC study is carried out target MAC (Media Access Control) address and searches by described outlet RB, if find corresponding target MAC (Media Access Control) address, then from the port repeat that this target MAC (Media Access Control) address is corresponding; If do not found, then flood.
Step 208: when to export label be multicast label, by outlet RB, the message after carrying out source MAC study carried out multicast group and search, after multicast replication forwarding being carried out to message according to lookup result, terminate current message forwarding process.
When the message that described entrance RB receives is known multicast message, described outlet label is multicast label, then, describedly message is carried out forwarding comprise according to outlet label: the message after carrying out source MAC study is carried out multicast group and searches by described outlet RB, carries out multicast replication forwarding according to lookup result to message.
Step 209: when exporting label for broadcast label, after being flooded by the port of the outlet RB corresponding to the label of the message after carrying out source MAC study in the MAC Address list item that the target MAC (Media Access Control) address found is corresponding by outlet RB, terminate current message forwarding process.
When the message that described entrance RB receives be unknown multicast packets or broadcasting packet time, described outlet label is broadcast label, then, describedly message is carried out forwarding comprise according to outlet label: the message after carrying out source MAC study floods from the port of the outlet RB corresponding to outlet label by described outlet RB, also namely copies forwarding from all of the port to message.
Based on the message forwarding method in above-mentioned TRILL network, the present invention further discloses as follows when MAC Address migration occurs, the RB in datum plane real-time update mac address table and the method for label information:
After entrance RB detects that there is the main frame access of migration this locality, the label associated in the list item that in renewal local mac address table, the MAC Address of this main frame is corresponding.
At the outlet RB in TRILL tunnel, carry out after decapsulation obtains original Ether frame, making the following judgment and operating when carrying out the mac learning of internal layer source to TRILL message:
If the RB change that this source MAC originally in mac address table is corresponding, then use the RB in the corresponding list item of this source MAC in the entrance RB renewal mac address table in message; And/or
If the label variations that this source MAC originally in mac address table is corresponding, then use the label in the corresponding list item of this source MAC in the ingress label renewal mac address table in message.
Also it should be noted that, when the local port cisco unity malfunction of RB or other reasons cause can not transceiving data message time, the present invention also provides following handling process further:
Step S1, this RB are by IGP agreement to other all RB advertisement label invalid messages, and message comprises the content such as the label Nickname of this RB and label corresponding to this port.
When other RB in step S2, TRILL network receive this notice, search each list item of local mac address table, if the label Nickname of the RB that MAC Address list item is corresponding is the Nickname of the RB in invalid message, and label corresponding to this MAC Address list item is the label in invalid message, be then unicast label by the tag update of the correspondence in mac address table.Above-mentioned IGP agreement is TRILL-ESADI.
So far, the whole workflow of message forwarding method in TRILL network of the present invention is namely completed.
Based on said method, Fig. 4 gives the structure of route-bridge embodiment one of the present invention, and as shown in Figure 4, this route-bridge is the entrance RB receiving message, and this route-bridge comprises:
Tag processes unit 41, for being the local unique label of each port assignment; By the MAC Address of local host and for receive local host send message local port distribute label learn in local mac address list item;
Message receiving element 42, for receiving the message to be forwarded sent by local host;
Message encapsulation unit 43, for the MAC Address list item that the target MAC (Media Access Control) address searching message to be forwarded in the local mac address table that learns at tag processes unit 41 is corresponding, according to lookup result, the message to be forwarded that message receiving element 42 receives is comprised to the TRILL encapsulation of entrance RB, ingress label and outlet RB, outlet label; The label of described ingress label to be entrance RB the be port assignment receiving described message to be forwarded, the result that described outlet label is searched according to target MAC (Media Access Control) address is determined;
Described packet sending unit, sends to outlet RB for the message after described message encapsulation unit is carried out TRILL encapsulation, forwards according to object MAC and outlet label to make outlet RB to message.
When the message to be forwarded that the main frame that described message receiving element 42 receives sends is known unicast message, the outlet label of the TRILL message that described message encapsulation unit 43 encapsulates is switch label type, and the port of the message after decapsulation from the outlet RB corresponding to outlet label forwards by described interactive tag instruction outlet RB;
When the message to be forwarded that the main frame that described message receiving element 42 receives sends is unknown unicast message, the outlet label of the TRILL message that described message encapsulation unit 43 encapsulates is unicast label type, described unicast label instruction outlet RB carries out target MAC (Media Access Control) address to the message after decapsulation and searches, if find corresponding MAC Address, then from the port repeat of correspondence; If do not found, then carry out local port and flood;
When the message to be forwarded that the main frame that described message receiving element 42 receives sends is known multicast message, the outlet label of the TRILL message that described message encapsulation unit 43 encapsulates is multicast label type, described multicast label instruction outlet RB carries out multicast group to the message after decapsulation and searches, and carries out multicast replication forwarding according to lookup result to message;
When the message to be forwarded that main frame that described message receiving element 42 receives sends be unknown multicast packets or broadcasting packet time, the outlet label of the TRILL message that described message encapsulation unit 43 encapsulates is multicast label type, and described multicast label instruction outlet RB carries out local port to the message after decapsulation and floods.
Further, this route-bridge also comprises tag update unit 45, for when this locality has detected that main frame is moved into, upgrades the label of the MAC address entries association that in the local mac address table of tag processes unit 41 study, this main frame of moving into is corresponding.
Further, this route-bridge also comprises invalid transmitting element 46, during port cisco unity malfunction for the reception message when described message receiving element 42, tag deactivation message is sent to other each RB, described tag deactivation message is used to indicate each RB receiving tag deactivation message at the Nickname judging the entrance RB carried during the Nickname of RB in local mac address list item is as tag deactivation message, and when comprising the label carried in tag deactivation message in this local mac address list item, tag update in the local mac address list item learnt by tag processes unit 41 is unicast label.
Similarly, based on said method, Fig. 5 gives the structure of route-bridge embodiment two of the present invention, and as shown in Figure 5, this route-bridge is the outlet RB E-Packeted, and comprising:
Tag processes unit 51, for being the local unique label of each port assignment; By the MAC Address of local host and for receive local host send message local port distribute label learn in local mac address list item;
Message receiving element 52, for receive by entrance RB send carry out comprising entrance RB, ingress label and outlet RB by entrance RB, the TRILL of outlet label encapsulate after TRILL message, the label of the port assignment of described ingress label to be entrance RB be message that Receiving Host sends, the result that described outlet label is searched according to target MAC (Media Access Control) address by entrance RB is determined;
Message decapsulation unit 53, carries out TRILL decapsulation for the message received described message receiving element 52;
Address learning unit 54, for carrying out the study of internal layer source MAC to the message after message decapsulation unit 53 decapsulation, learns in local mac address list item by internal layer source MAC, entrance RB and ingress label;
Message repeating unit 55, for forwarding the message after the decapsulation of described message decapsulation unit 53 according to outlet label.
When the outlet label in the TRILL message that described message receiving element 52 receives is switch label type, described message repeating unit 55 forwards for the port corresponding to the outlet label that received from message receiving element 52 by the message after message decapsulation unit 53 decapsulation;
When the outlet label in the TRILL message that described message receiving element 52 receives is unicast label type, described message repeating unit 55 is searched for the message after message decapsulation unit 53 decapsulation is carried out target MAC (Media Access Control) address, if find corresponding MAC Address, then from the port repeat of correspondence; If do not found, then carry out local port and flood;
When the outlet label in the TRILL message that described message receiving element 52 receives is multicast label type, described message repeating unit 55 is searched for the message after message decapsulation unit 53 decapsulation is carried out multicast group, carries out multicast replication forwarding according to lookup result to message;
When the outlet label in the TRILL message that described message receiving element 52 receives is for broadcast tag types, described message repeating unit 55 floods for the message after message decapsulation unit 53 decapsulation is carried out local port.
Further, described address learning unit 54 also for:
When judging that the RB in the MAC Address list item that the internal layer source MAC in local mac address table in this TRILL message is corresponding changes, use the RB in the MAC Address list item that in the renewal of the entrance RB in message local mac address table, this source MAC is corresponding; And/or,
When judging that the label in the MAC Address list item that the internal layer source MAC in local mac address table in this TRILL message is corresponding changes, use the label in the MAC Address list item that in the renewal of the ingress label in message local mac address table, this source MAC is corresponding.
Further, this route-bridge also comprises invalid receiver unit 56 and tag update unit 57, wherein,
Described invalid receiver unit 56, during port cisco unity malfunction for the reception message as entrance RB, receives the tag deactivation message sent by entrance RB, and described tag deactivation message comprises the Nickname of entrance RB and the label for this port assignment;
Described tag update unit 57, for after described invalid receiver unit 56 receives tag deactivation message, check local mac address table, as the Nickname judging the entrance RB carried during the Nickname of RB in local mac address list item is as tag deactivation message and when comprising the label carried in tag deactivation message in this local mac address list item, the tag update in the local mac address list item learnt by tag processes unit 51 is unicast label.
So far, the route-bridge in TRILL network of the present invention is namely obtained.The workflow of route-bridge described in Fig. 4 and Fig. 5 specifically see the workflow of method described in Fig. 2, can repeat no more here.
In a word, message forwarding method in TRILL network of the present invention, local unique label is distributed by being respectively local port by entrance RB and outlet RB, by the MAC Address of local host and for receive local host send message local port distribute label learn in local mac address list item, after entrance RB receives the message to be forwarded sent by local host, the MAC Address list item that the target MAC (Media Access Control) address of message to be forwarded is corresponding is searched in local mac address table, treat to E-Packet according to lookup result and carry out comprising entrance RB, ingress label and outlet RB, the TRILL encapsulation of outlet label, TRILL message after encapsulation is sent to outlet RB, entrance RB is comprised by what receive by outlet RB, ingress label, the TRILL message of outlet RB and outlet label carries out TRILL decapsulation, and carry out the study of internal layer source MAC, by internal layer source MAC, entrance RB and ingress label learn in local mac address list item, and according to outlet label, the message after decapsulation is forwarded.Due to the corresponding relation between the port that the present invention sets up label and Receiving Host message, after RB carries out the study of source MAC, the message repeating based on label can be realized, thus decrease MAC Address and search, therefore, the inventive method not only avoid the time waste problem that may cause owing to searching large mac address table, but also reduces forwarding complexity.
Further, when MAC Address is moved, the inventive method upgrades the label of the MAC address entries association that in local mac address table, this main frame of moving into is corresponding at entrance RB, and when the RB exported in MAC Address list item corresponding to the internal layer source MAC in RB judgement local mac address table in this TRILL message or label change, use the entrance RB in message or ingress label to upgrade RB in the MAC Address list item that in local mac address table, this source MAC is corresponding or label, also just solve MAC Address and move the problem that the message that may cause can not normally forward.
Finally, when entrance RB receives the port cisco unity malfunction of message to be forwarded, the inventive method is by being comprised the tag deactivation information of the Nickname of entrance RB and the label for the port assignment of reception message to be forwarded to other each RB transmission by this entrance RB, and then each RB receiving tag deactivation information checks local mac address table, when the Nickname of RB in MAC Address list item is the Nickname of entrance RB in tag deactivation message, when and MAC Address list item is got the bid, label are the label in tag deactivation message, be unicast label by the tag update in MAC Address list item, also the port cisco unity malfunction owing to receiving message is just avoided and problem that the message that brings can not normally forward.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (16)
1. the message forwarding method in multi-link transparent interconnection TRILL network, is characterized in that, the method is applied to the entrance RB in TRILL network, comprising:
Entrance RB is that each local port distributes local unique label, learns in local mac address list item by the label that the MAC Address of local host and the local port that sends message for receiving local host are distributed;
After entrance RB receives the message to be forwarded sent by local host, the MAC Address list item that the target MAC (Media Access Control) address of message to be forwarded is corresponding is searched in local mac address table, treat to E-Packet according to lookup result and carry out comprising the TRILL encapsulation of entrance RB, ingress label and outlet RB, outlet label, the TRILL message after encapsulation is sent to outlet RB; The label of described ingress label to be entrance RB the be port assignment receiving described message to be forwarded, the result that described outlet label is searched according to target MAC (Media Access Control) address by entrance RB is determined;
Described outlet label is used to indicate outlet RB and forwards the TRILL message after decapsulation according to this outlet label after completing the decapsulation to described TRILL message.
2. method according to claim 1, is characterized in that,
When the message to be forwarded that described entrance RB receives is known unicast message, then described outlet label is switch label type, and described outlet RB carries out forwarding according to outlet label to the message after decapsulation and comprises: the port of the message after decapsulation from the outlet RB corresponding to outlet label forwards by outlet RB;
When the message to be forwarded that described entrance RB receives is unknown unicast message, described outlet label is unicast label type, then described outlet RB carries out forwarding to the message after decapsulation comprise according to outlet label: the message after decapsulation is carried out target MAC (Media Access Control) address and searches by outlet RB, if find corresponding MAC Address, then from the port repeat of correspondence; If do not found, then carry out local port and flood;
When the message to be forwarded that described entrance RB receives is known multicast message, described outlet label is multicast label type, then described outlet RB carries out forwarding to the message after decapsulation comprise according to outlet label: the message after decapsulation is carried out multicast group and searches by outlet RB, carries out multicast replication forwarding according to lookup result to message;
When the message to be forwarded that described entrance RB receives be unknown multicast packets or broadcasting packet time, described outlet label is broadcast tag types, then described outlet RB carries out forwarding to the message after decapsulation comprise according to outlet label: export RB and carry out local port to the message after decapsulation and flood.
3. method according to claim 1 and 2, is characterized in that, when MAC Address is moved, described method also comprises: entrance RB, when this locality has detected that main frame is moved into, upgrades the label of the MAC address entries association that in local mac address table, this main frame of moving into is corresponding.
4. method according to claim 1 and 2, is characterized in that, when the port cisco unity malfunction of the described message to be forwarded of reception of entrance RB, the method comprises further:
Entrance RB sends tag deactivation message to other each RB, and described tag deactivation message comprises the label of the label Nickname of entrance RB and the port assignment for described reception message to be forwarded;
It is unicast label that described tag deactivation message is used to indicate the RB that receives tag deactivation message by the tag update in the MAC Address list item of the label Nickname and same label that comprise identical entrance RB in local mac address table.
5. the message forwarding method in multi-link transparent interconnection TRILL network, is characterized in that, the method is applied to the outlet RB in TRILL network, comprising:
Outlet RB is that each local port distributes local unique label, learns in local mac address list item by the label that the MAC Address of local host and the local port that sends message for receiving local host are distributed;
Outlet RB receive by entrance RB send comprise entrance RB, ingress label, outlet RB and outlet label TRILL message after, carry out TRILL decapsulation, and carry out the study of internal layer source MAC, internal layer source MAC, entrance RB and ingress label are learnt in local mac address list item; The label of the port assignment of described ingress label to be entrance RB be message that Receiving Host sends, described outlet label is the determined label of result that entrance RB searches according to target MAC (Media Access Control) address;
Outlet RB forwards the message after decapsulation according to outlet label.
6. method according to claim 5, is characterized in that,
When described outlet label is switch label type, described outlet RB carries out forwarding according to outlet label to the message after decapsulation and comprises: the port of the message after decapsulation from the outlet RB corresponding to outlet label forwards by outlet RB;
When described outlet label is unicast label type, then described outlet RB carries out forwarding to the message after decapsulation comprise according to outlet label: the message after decapsulation is carried out target MAC (Media Access Control) address and searches by outlet RB, if find corresponding MAC Address, then from the port repeat of correspondence; If do not found, then carry out local port and flood;
When described outlet label is multicast label type, then described outlet RB carries out forwarding to the message after decapsulation comprise according to outlet label: the message after decapsulation is carried out multicast group and searches by outlet RB, carries out multicast replication forwarding according to lookup result to message;
When described outlet label is broadcast tag types, then described outlet RB carries out forwarding to the message after decapsulation comprise according to outlet label: export RB and carry out local port to the message after decapsulation and flood.
7. the method according to claim 5 or 6, is characterized in that, when MAC Address is moved, described outlet RB carries out decapsulation to the TRILL message received, and when carrying out the study of internal layer source MAC, the method also comprises:
RB in the MAC Address list item that the internal layer source MAC in this TRILL message in outlet RB judgement local mac address table is corresponding changes, then use the RB in the MAC Address list item that in the renewal of the entrance RB in message local mac address table, this source MAC is corresponding; And/or,
Label in the MAC Address list item that the internal layer source MAC in this TRILL message in outlet RB judgement local mac address table is corresponding changes, then use the label in the MAC Address list item that in the renewal of the ingress label in message local mac address list item, this source MAC is corresponding.
8. the method according to claim 5 or 6, is characterized in that, the method comprises further:
When exporting RB and receiving the tag deactivation message of the label Nickname comprising entrance RB that entrance RB sends and label corresponding to the port of cisco unity malfunction, check local mac address list item, when the Nickname of RB in local mac address list item is the Nickname of entrance RB in tag deactivation message and comprises the label in tag deactivation message in local mac address list item, be unicast label by the tag update in local mac address list item.
9. the route-bridge in multi-link transparent interconnection TRILL network, this route-bridge is the entrance route-bridge RB receiving message, and it is characterized in that, this route-bridge comprises:
Tag processes unit, for being the local unique label of each port assignment; By the MAC Address of local host and for receive local host send message local port distribute label learn in local mac address list item;
Message receiving element, for receiving the message to be forwarded sent by local host;
Message encapsulation unit, the MAC Address list item that the target MAC (Media Access Control) address for searching message to be forwarded in local mac address table is corresponding, treats to E-Packet according to lookup result and carries out comprising the TRILL encapsulation of entrance RB, ingress label and outlet RB, outlet label; The label of described ingress label to be entrance RB the be port assignment receiving described message to be forwarded, the result that described outlet label is searched according to target MAC (Media Access Control) address is determined;
Described packet sending unit, sends to outlet RB for the message after described message encapsulation unit is carried out TRILL encapsulation, forwards according to object MAC and outlet label to make outlet RB to message.
10. route-bridge according to claim 9, is characterized in that,
When the message to be forwarded that the main frame that described message receiving element receives sends is known unicast message, the outlet label of the TRILL message of described message encapsulation unit encapsulation is switch label type, and the port of the message after decapsulation from the outlet RB corresponding to outlet label forwards by described interactive tag instruction outlet RB;
When the message to be forwarded that the main frame that described message receiving element receives sends is unknown unicast message, the outlet label of the TRILL message of described message encapsulation unit encapsulation is unicast label type, described unicast label instruction outlet RB carries out target MAC (Media Access Control) address to the message after decapsulation and searches, if find corresponding MAC Address, then from the port repeat of correspondence; If do not found, then carry out local port and flood;
When the message to be forwarded that the main frame that described message receiving element receives sends is known multicast message, the outlet label of the TRILL message of described message encapsulation unit encapsulation is multicast label type, described multicast label instruction outlet RB carries out multicast group to the message after decapsulation and searches, and carries out multicast replication forwarding according to lookup result to message;
When the message to be forwarded that main frame that described message receiving element receives sends be unknown multicast packets or broadcasting packet time, the outlet label of the TRILL message of described message encapsulation unit encapsulation is multicast label type, and described multicast label instruction outlet RB carries out local port to the message after decapsulation and floods.
11. route-bridges according to claim 9 or 10, it is characterized in that, this route-bridge also comprises tag update unit, for when this locality has detected that main frame is moved into, upgrades the label of the MAC address entries association that in local mac address table, this main frame of moving into is corresponding.
12. route-bridges according to claim 9 or 10, it is characterized in that, this route-bridge also comprises invalid transmitting element, during port cisco unity malfunction for the reception message when described message receiving element, tag deactivation message is sent to other each RB, described tag deactivation message is used to indicate each RB receiving tag deactivation message at the Nickname judging the entrance RB carried during the Nickname of RB in local mac address list item is as tag deactivation message, and when comprising the label carried in tag deactivation message in this local mac address list item, be unicast label by the tag update in local mac address list item.
Route-bridge in 13. 1 kinds of multi-link transparent interconnection TRILL network, this route-bridge is the outlet route-bridge RB E-Packeted, and it is characterized in that, this route-bridge comprises:
Tag processes unit, for being the local unique label of each port assignment; By the MAC Address of local host and for receive local host send message local port distribute label learn in local mac address list item;
Message receiving element, for receive by entrance RB send carry out comprising entrance RB, ingress label and outlet RB by entrance RB, the TRILL of outlet label encapsulate after TRILL message, the label of the port assignment of described ingress label to be entrance RB be message that Receiving Host sends, the result that described outlet label is searched according to target MAC (Media Access Control) address by entrance RB is determined;
Message decapsulation unit, carries out TRILL decapsulation for the message received described message receiving element;
Address learning unit, for carrying out the study of internal layer source MAC to the message after the decapsulation of message decapsulation unit, learns in local mac address list item by internal layer source MAC, entrance RB and ingress label;
Message repeating unit, for forwarding the message after the decapsulation of described message decapsulation unit according to outlet label.
14. route-bridges according to claim 13, is characterized in that,
When the outlet label in the TRILL message that described message receiving element receives is switch label type, described message repeating unit is used for the message after decapsulation to forward from the port corresponding to outlet label;
When the outlet label in the TRILL message that described message receiving element receives is unicast label type, described message repeating unit is used for that the message after decapsulation is carried out target MAC (Media Access Control) address and searches, if find corresponding MAC Address, then from the port repeat of correspondence; If do not found, then carry out local port and flood;
When the outlet label in the TRILL message that described message receiving element receives is multicast label type, described message repeating unit is used for that the message after decapsulation is carried out multicast group and searches, and carries out multicast replication forwarding according to lookup result to message;
When the outlet label in the TRILL message that described message receiving element receives is for broadcast tag types, described message repeating unit is used for that the message after decapsulation is carried out local port and floods.
15. route-bridges according to claim 13 or 14, is characterized in that, described address learning unit also for:
When judging that the RB in the MAC Address list item that the internal layer source MAC in local mac address table in this TRILL message is corresponding changes, use the RB in the MAC Address list item that in the renewal of the entrance RB in message local mac address table, this source MAC is corresponding; And/or,
When judging that the label in the MAC Address list item that the internal layer source MAC in local mac address table in this TRILL message is corresponding changes, use the label in the MAC Address list item that in the renewal of the ingress label in message local mac address table, this source MAC is corresponding.
16. route-bridges according to claim 13 or 14, it is characterized in that, this route-bridge also comprises invalid receiver unit and tag update unit, wherein,
Described invalid receiver unit, during port cisco unity malfunction for the reception message as entrance RB, receives the tag deactivation message sent by entrance RB, and described tag deactivation message comprises the Nickname of entrance RB and the label for this port assignment;
Described tag update unit, for after described invalid receiver unit receives tag deactivation message, check local mac address table, as the Nickname judging the entrance RB carried during the Nickname of RB in local mac address list item is as tag deactivation message and when comprising the label carried in tag deactivation message in this local mac address list item, be unicast label by the tag update in local mac address list item.
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| CN103200569B (en) * | 2013-03-18 | 2015-08-05 | 京信通信系统（中国）有限公司 | A kind of data packet sending method and device |
| CN103401781B (en) * | 2013-07-18 | 2016-10-05 | 杭州华三通信技术有限公司 | It is applied to cut-in method and the equipment of multilink transparent interconnection network |
| CN104601477B (en) * | 2013-10-31 | 2018-08-21 | 华为技术有限公司 | The cut-in method and route bridging equipment of TRILL network |
| CN104683230B (en) * | 2013-11-28 | 2018-09-07 | 华为技术有限公司 | The treating method and apparatus of the translucent interconnection message of multi-link |
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| CN104320342B (en) * | 2014-10-29 | 2017-10-27 | 新华三技术有限公司 | Message forwarding method and device in a kind of transparent interconnection of lots of links internet |
| CN105634776B (en) * | 2014-10-31 | 2020-01-31 | 华为技术有限公司 | method and device for determining message forwarding interface |
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| CN105577542B (en) * | 2015-12-25 | 2019-05-14 | 迈普通信技术股份有限公司 | A kind of message forwarding method and routing bridge based on TRILL network |
| CN107294863B (en) * | 2017-06-22 | 2021-04-16 | 深圳市泰信通信息技术有限公司 | Network data stream forwarding method, device and system and readable storage medium |
| CN108259350B (en) * | 2017-10-24 | 2021-02-26 | 新华三技术有限公司 | Message transmission method and device and machine-readable storage medium |
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