CN102055635B - TM method for Ethernet ring network and ring network node - Google Patents
TM method for Ethernet ring network and ring network node Download PDFInfo
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- CN102055635B CN102055635B CN200910236840.7A CN200910236840A CN102055635B CN 102055635 B CN102055635 B CN 102055635B CN 200910236840 A CN200910236840 A CN 200910236840A CN 102055635 B CN102055635 B CN 102055635B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
- H04L12/462—LAN interconnection over a bridge based backbone
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/12—Discovery or management of network topologies
Abstract
The invention discloses a TM (Topology Management) method for an Ethernet ring network, which comprises the steps as follows: nodes containing ring obstruct ports send topology to a TF frame periodically along good ports; other nodes in the ring network transmit the TF frame sequentially, and during the TF frame transmitting process, all nodes refresh respective topological databases according to information carried by the TF frame, as well as the information carried by the TF frame. The invention discloses a ring network node correspondingly, which comprises a TF frame transmission unit, a TF frame receiving unit, a topological database, a node information renewal unit, a TF frame renewal unit and a TF frame transmitting unit. Since the TF frame is transmitted among the nodes of the ring network, node positions, topology condition, the accessibility of path, and other information in the entire network can be determined quickly and conveniently, so as to facilitate maintenance and management of ring network operation.
Description
Technical field
The present invention relates to Ethernet ring protection technology, particularly relate to a kind of topological management method and looped network node of ethernet ring network.
Background technology
Along with Ethernet is towards the development in multiple service supporting direction, particularly some business are more and more higher to the reliability of network, requirement of real-time, and Ethernet is widely used the networking of annular to improve network reliability.In the guard method of annular, usually require quick protective switch (as reaching below 50ms).The technology of current this quick protective switch has Internet Engineering Task group (Internet Engineering Task Force; IETF) RFC3619, International Telecommunication Union (International Telecommunication Union, ITU-T) G.8032 etc.
Fig. 1 is a kind of structural representation of ethernet ring network, and as shown in Figure 1, node A to node F is for having the node of Ethernet exchanging function, and network M is connected with Node B, and network N is connected with node D.Communicate between network M and network N.Two physical pathways are had, that is: network N ← → node D ← → node C ← → Node B ← → network M, network N ← → node D ← → node E ← → node F ← → node A ← → Node B ← → network M between network M and network N.
When applying Ethernet ring protection switching technology; generally define ring protection link and Controlling vertex; namely in the trouble-free situation of ethernet ring network; on ring to data message block anti-loops formed link be ring protection link; by the operation to this section of ring protection link, the primary path of looped network and the switching of Protection path can be carried out.Have the node of ring protection link, referred to herein as Controlling vertex (or being called host node).Such as, the node that ethernet ring network shown in Fig. 1 comprises has A, B, C, D, E and F, the link comprised has <A, B>, <B, C>, <C, D>, <D, E>, <E, F> and <F, A> link.Node A is Controlling vertex, and with w direct port connection link <F, A> is ring protection link.
When ring uplink is intact, Controlling vertex needs to block the data message forwarding function with ring protection link connected port, and in network, loop free produces, thus prevents " broadcast storm " because network loop causes.Fig. 2 is the data retransmission schematic diagram of ethernet ring network shown in Fig. 1 under looped network non-failure conditions; as shown in Figure 2; Controlling vertex A blocks the protected data forwarding capability of w port, and the communication path of network M and N is: network M ← → Node B ← → node C ← → node D ← → network N.
When link occurs fault, Controlling vertex needs to decontrol the data message forwarding function with ring protection link connected port, thus has ensured the connection of business.Fig. 3 is the data retransmission schematic diagram of ethernet ring network shown in Fig. 1 under looped network breaks down situation, as shown in Figure 3, <B on ring, C> link there occurs fault, Controlling vertex A decontrols the data message forwarding function of port w, and communication path new between network M and network N is: network M ← → Node B ← → node A ← → node F ← → node E ← → node D ← → network N.Here, link failure is the wherein a kind of situation causing pretection switch, and also comprise Manual Switch, the situation such as to switch by force, more detailed details of operation refers to ITU-T standard G.8032.
But, the correlation technique managed Ethernet topology is not proposed at present, so, attendant is in looped network maintenance process, need to expend larger energy with the information such as find node location in overall network, topological condition, whether path can reach, so prior art is unfavorable for maintenance and the management of loop-net operation.
Summary of the invention
In view of this, main purpose of the present invention is the topological management method and the looped network node that provide a kind of ethernet ring network, the information such as can find the node location in overall network, topological condition quickly and easily, whether path can reach, thus be convenient to maintenance and the management of loop-net operation.
For achieving the above object, technical scheme of the present invention is achieved in that
A topological management method for ethernet ring network, comprising:
Node containing port blocked on ring periodically sends Topology Discovery TF frame along intact port;
In looped network, other node sequence forward TF frame, in forwarding TF frame process, and the nodal information of the information updating self that each node carries according to TF frame, and the information that renewal TF frame carries.
The described node containing port blocked on ring sends TF frame along intact port and is specially:
The node identification NODE_ID of self is write the NODE_ID field of TF frame by the node containing port blocked on ring, and the ring upper port of the state of port blocked write TF frame is blocked mark BPR field;
Judge that transmit port is port blocked containing the node of port blocked on ring, then the sum of node on the ring is deducted the protocol frame life span ttl field of the value write TF frame of 1, more described TF frame is sent from described transmit port; Transmit port is judged not as port blocked containing the node of port blocked on ring, then the NODE_ID of self is write the node identification list NODE_LIST field of TF frame, and the sum of node on the ring is deducted the ttl field of the value write TF frame of 1, more described TF frame is sent from described transmit port.
Described looped network node forwards TF frame and is specially:
After node receives TF frame, judge that described TF frame receives from port blocked, then abandon described TF frame, flow process terminates; Node judges that described TF frame does not receive from port blocked, then read the relevant field information of described TF frame;
Node judges that the value of NODE_ID, BPR that the NODE_ID field of TF frame, the value of BPR field and node store is unequal, then refresh the topological database of receiving port, topology information in the NODE_LIST of TF frame is write the topological database of this port, and the value of NODE_ID, BPR that self stores is upgraded according to the value of the NODE_ID field of TF frame, BPR field, perform subsequent step afterwards; Node judges that the value of the NODE_ID field of TF frame, BPR field is equal with the value of NODE_ID, BPR that node stores, then directly perform subsequent step;
The NODE_ID of self is write the NODE_LIST field of TF frame by node, and the value of the ttl field of TF frame is reduced 1;
Node judges that the value of the ttl field of TF frame is 0, then flow process terminates; Node judges that the value of the ttl field of TF frame is not 0, then forwarded from another intact ring upper port by described TF frame.
Described port blocked is: the port that the port of man-made obstructions or fault are blocked.
A kind of looped network node, comprising: TF frame transmitting element, TF frame receiving element, nodal information updating block, memory cell, TF frame updating block and TF frame retransmission unit, wherein,
Described TF frame transmitting element, for when looped network node contains port blocked on ring, periodically sends TF frame along intact port;
Described TF frame receiving element, for receiving the TF frame that other looped network nodes send;
Described nodal information updating block, the nodal information of information to cell stores that the TF frame for receiving according to TF frame receiving element carries upgrades;
Described memory cell, for storing the nodal information of looped network node;
Described TF frame updating block, for upgrade TF frame receiving element receive TF frame entrained by information;
Described TF frame retransmission unit, for forwarding the TF frame after the process of TF frame updating block.
This looped network node also comprises TF frame generation unit,
Described TF frame generation unit, for the NODE_ID of described looped network node being write the NODE_ID field of TF frame, and by the BPR field of the state of port blocked write TF frame, and when judging that transmit port is port blocked, the sum of node on the ring is deducted the ttl field of the value write TF frame of 1; When judging transmit port not as port blocked, the NODE_ID of described looped network node is write the NODE_LIST field of TF frame, and the sum of node on the ring is deducted the ttl field of the value write TF frame of 1; The TF frame of generation is also sent to TF frame transmitting element by TF frame generation unit;
Described TF frame transmitting element, also for being sent from transmit port by the TF frame from TF frame generation unit.
Described TF frame receiving element, also for judging whether described TF frame receives from port blocked, and TF frame receives from port blocked after reception TF frame, then TF frame receiving element abandons described TF frame; TF frame does not receive from port blocked, then TF frame receiving element reads the relevant field information of described TF frame, and judge that further the value of NODE_ID, BPR that whether the value of the NODE_ID field of TF frame, BPR field stores with node is unequal, the value of NODE_ID, BPR that the NODE_ID field of TF frame, the value of BPR field and node store is unequal, then TF frame receiving element notifying section dot information updating block; The NODE_ID field of TF frame, the value of BPR field are equal with the value of NODE_ID, BPR that node stores, then notify TF frame updating block;
Described nodal information updating block, also for after the notice receiving TF frame receiving element, the topological database of the receiving port that refresh of memory cells stores, topology information in the NODE_LIST of TF frame is write the topological database of this port, and the value of NODE_ID, BPR of cell stores is upgraded according to the value of the NODE_ID field of TF frame, BPR field, after renewal completes, nodal information updating block notice TF frame updating block;
Described TF frame updating block, also for after the notice receiving TF frame receiving element or nodal information updating block, the NODE_ID of looped network node is write the NODE_LIST field of TF frame, the value of the ttl field of TF frame is reduced 1, and the TF frame after upgrading is sent to TF frame retransmission unit;
Described TF frame retransmission unit, also for after receiving the TF frame from TF frame updating block, judges whether the value of the ttl field of described TF frame is 0, and when the value of the ttl field of TF frame is not 0, is forwarded by described TF frame from another intact ring upper port.
On the ring that looped network node contains, port blocked is: the port that the port of man-made obstructions or fault are blocked.
The topological management method of ethernet ring network of the present invention and looped network node, Topology Discovery (Topology Find is periodically sent along intact port by the node containing port blocked on ring, TF) frame, and forwarded by each node sequence of loop, TF frame is in the process forwarded by node each on loop, the nodal information of the information updating self that each node can carry according to TF frame, and the information that renewal TF frame carries.Because the present invention by forwarding TF frame between each node of looped network, the information such as can find the node location in overall network, topological condition quickly and easily, whether path can reach, so that the maintenance of loop-net operation and management.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of ethernet ring network;
Fig. 2 is the data retransmission schematic diagram of ethernet ring network shown in Fig. 1 under looped network non-failure conditions;
Fig. 3 is the data retransmission schematic diagram of ethernet ring network shown in Fig. 1 under looped network breaks down situation;
Fig. 4 is the topological management method schematic flow sheet of ethernet ring network of the present invention;
Fig. 5 is the detailed process schematic diagram of node along intact port transmission TF frame that the present invention contains port blocked on ring;
Fig. 6 is after node on the ring of the present invention receives TF frame, forwards the detailed process schematic diagram of TF frame;
Fig. 7 is the structural representation of looped network node of the present invention;
Fig. 8 is the ethernet ring network schematic diagram of the embodiment of the present invention 1;
Fig. 9 is the ethernet ring network schematic diagram of the embodiment of the present invention 2.
Embodiment
Basic thought of the present invention is: the node containing port blocked on ring periodically sends TF frame along intact port, and forwarded by each node sequence of loop, TF frame is in the process forwarded by node each on loop, the nodal information of the information updating self that each node can carry according to TF frame, and the information that renewal TF frame carries.
The present invention finds agreement based on ITU-T a kind of ring-network topology G.8032, and Fig. 4 is the topological management method schematic flow sheet of ethernet ring network of the present invention, and as shown in Figure 4, the topological management method of ethernet ring network of the present invention generally comprises following steps:
Step 41: the node containing port blocked on ring periodically sends TF frame along intact port.
The obstruction of port can be man-made obstructions also can be that fault is blocked, and namely port blocked can be the port of man-made obstructions, also can be the port that fault is blocked.Fig. 5 is the detailed process schematic diagram of node along intact port transmission TF frame that the present invention contains port blocked on ring, and as shown in Figure 5, the node that the present invention contains port blocked on ring sends TF frame along intact port and specifically comprises:
Step 411: the NODE_ID of self is write the NODE_ID field of TF frame by the node containing port blocked on ring, and by the BPR field of the state of port blocked write TF frame.
TF frame at least comprises: mark (NODE_ID), the ring upper port of the sending node of TF frame block mark (BPR), protocol frame life span (TTL) and node identification list (NODE_LIST), wherein, NODE_LIST is used for depositing the node identification of (sending node is to receiving node) on TF frame propagation path; BPR field is that ring upper port blocks mark, and such as, the value of BPR field is 1 expression port block in the east, and the value of BPR field is 0 expression west port block; NODE_ID field be TF frame be used for sending node mark field.
Step 412: judge whether transmit port is port blocked containing the node of port blocked on ring, if so, performs step 414; Otherwise, perform step 413.
Step 413: the NODE_ID of self is write the NODE_LIST field of TF frame by the node containing port blocked on ring.
Step 414: N-1 is write the ttl field of TF frame by node, then sends from described transmit port, N is the sum of node on the ring.
Step 42: in looped network, other node sequence forward TF frame, in forwarding TF frame process, the nodal information of the information updating self that each node carries according to TF frame, and the information that renewal TF frame carries.
Here, nodal information mainly refers to the topological database of each port, and the value of NODE_ID, BPR of node storage.
Fig. 6 is after node on the ring of the present invention receives TF frame, forwards the detailed process schematic diagram of TF frame, as shown in Figure 6, after node on the ring of the present invention receives TF frame, forwards TF frame and specifically comprises the following steps:
Step 601: node receives TF frame.
Step 602: node judges whether described TF frame receives from port blocked, if so, proceeds to step 603; Otherwise proceed to step 604.
Step 603: node abandons described TF frame, and flow process terminates.
Step 604: node reads the relevant field information of TF frame.
Step 605: node judges that whether the value of NODE_ID, BPR that the NODE_ID field of TF frame, the value of BPR field and node store is unequal, if not etc., proceed to step 606; Otherwise, proceed to step 608.
Step 606: node refreshes the topological database of receiving port, the topology information in the NODE_LIST of TF frame is write the topological database of this port.
Step 607: the value of NODE_ID, BPR that node self stores according to the NODE_ID field of TF frame, the value renewal of BPR field.
Step 608: the NODE_ID of self is write the NODE_LIST field of TF frame by node.
Step 609: the value of the ttl field of TF frame is reduced 1 by node.
Step 610: node judges whether the value of ttl field is 0, and if so, flow process terminates; Otherwise, proceed to step 611.
Step 611: TF frame forwards from another intact ring upper port by node.
Fig. 7 is the structural representation of looped network node of the present invention, as shown in Figure 7, looped network node of the present invention comprises: TF frame transmitting element 71, TF frame receiving element 72, nodal information updating block 73, memory cell 74, TF frame updating block 75 and TF frame retransmission unit 76, wherein
TF frame transmitting element 71, for when looped network node contains port blocked on ring, periodically sends TF frame along intact port;
TF frame receiving element 72, for receiving the TF frame that other looped network nodes send;
Nodal information updating block 73, the information that the TF frame for receiving according to TF frame receiving element 72 carries upgrades the nodal information that memory cell 74 stores;
Memory cell 74, for storing the nodal information of looped network node;
TF frame updating block 75, for upgrade TF frame receiving element 72 receive TF frame entrained by information;
TF frame retransmission unit 76, for forwarding the TF frame after the process of TF frame updating block 75.
This looped network node also comprises TF frame generation unit 77,
TF frame generation unit 77, for the NODE_ID of described looped network node being write the NODE_ID field of TF frame, and by the BPR field of the state of port blocked write TF frame, and when judging that transmit port is port blocked, the sum of node on the ring is deducted the ttl field of the value write TF frame of 1; When judging transmit port not as port blocked, the NODE_ID of described looped network node is write the NODE_LIST field of TF frame, and the sum of node on the ring is deducted the ttl field of the value write TF frame of 1; The TF frame of generation is also sent to TF frame transmitting element 71 by TF frame generation unit;
TF frame transmitting element 71, also for being sent from transmit port by the TF frame from TF frame generation unit 77.
TF frame receiving element 72, also for judging whether described TF frame receives from port blocked, and TF frame receives from port blocked after reception TF frame, then TF frame receiving element abandons described TF frame; TF frame does not receive from port blocked, then TF frame receiving element 72 reads the relevant field information of described TF frame, and judge that further the value of NODE_ID, BPR that whether the value of the NODE_ID field of TF frame, BPR field stores with node is unequal, the value of NODE_ID, BPR that the NODE_ID field of TF frame, the value of BPR field and node store is unequal, then TF frame receiving element 72 notifying section dot information updating block 73; The NODE_ID field of TF frame, the value of BPR field are equal with the value of NODE_ID, BPR that node stores, then notify TF frame updating block 75;
Nodal information updating block 73, also for after the notice receiving TF frame receiving element 72, the topological database of the receiving port that refresh of memory cells 74 stores, topology information in the NODE_LIST of TF frame is write the topological database of this port, and the value of NODE_ID, BPR of cell stores is upgraded according to the value of the NODE_ID field of TF frame, BPR field, after renewal completes, nodal information updating block 73 notifies TF frame updating block 75;
TF frame updating block 75, also for after the notice receiving TF frame receiving element 72 or nodal information updating block 73, the NODE_ID of looped network node is write the NODE_LIST field of TF frame, the value of the ttl field of TF frame is reduced 1, and the TF frame after upgrading is sent to TF frame retransmission unit 76;
TF frame retransmission unit 76, also for after receiving the TF frame from TF frame updating block 75, judges whether the value of the ttl field of described TF frame is 0, and when the value of the ttl field of TF frame is not 0, is forwarded by described TF frame from another intact ring upper port.
On the ring that looped network node contains, port blocked is: the port that the port of man-made obstructions or fault are blocked.
Be described in further detail below in conjunction with the enforcement of embodiment to technical scheme.
Embodiment 1
By the present embodiment, the Topology Discovery of looped network under non-failure conditions is described.Fig. 8 is the ethernet ring network schematic diagram of the embodiment of the present invention 1, and as shown in Figure 8, looped network comprises node A, B, C, D, E and F, and the link between them, and Controlling vertex A blocks the forwarding capability of the data message of w port under non-failure conditions.
Controlling vertex A periodically sends TF1 message along w port, periodically sends TF2 message along e port.Because the w port of node A is port blocked, so node A is not by the NODE_LIST of the node number of self write TF1.For TF2, node A is by the NODE_LIST of the node number of self write TF2.
For node A, because its w port is port blocked, so node A abandons the TF2 frame received, it can only from the topology information e port study TF1.When the value that node A finds NODE_ID, BPR in TF1 and the value of NODE_ID, BPR of self preserving inconsistent time, node A removes the value of the original topological database of e port and NODE_ID, BPR, the topology information " B-C-D-E-F " of the NODE_LIST in TF1 is write the topological database of e port, and the value of preserving NODE_ID, BPR is the value of NODE_ID, BPR in TF1.
For Node B, C, D, E and F, we are only described for node D.
When node D receives TF1 frame from e port, if the value that node D finds NODE_ID, BPR in TF1 and the value of NODE_ID, BPR of self preserving inconsistent time, node D removes the value of the original topological database of e port and NODE_ID, BPR, the topology information " E-F " of the NODE_LIST in TF1 is write the topological database of e port, and the value of preserving NODE_ID, BPR is NODE_ID in TF1, the value of BPR; The NODE_ID of oneself is write the NODE_LIST of TF1 frame by node D, and the value of TTL is reduced 1, and then TF1 frame is gone out from w port repeat by node D.Node D to the process of the TF2 frame received from w port with similar to the process of the TF1 frame received.
Embodiment two
By the present embodiment, looped network Topology Discovery is in case of a fault described.
Fig. 9 is the ethernet ring network schematic diagram of the embodiment of the present invention 2, as shown in Figure 9, Node B and C detect <B, C> link occurs fault, Node B and C block the data message forwarding function of e and w port respectively, and Controlling vertex A opens the data message forwarding function of w port.Node B periodically sends TF2 message along w port, and Node B is by the NODE_LIST of the node number of self write TF2.Node C periodically sends TF1 message along e port, and node C is by the NODE_LIST of the node number of self write TF1.
TF1 is received so that the present invention to be described from w port below for node F:
When node F receives TF1 frame from w port, if the value that node F finds NODE_ID, BPR in TF1 and the value of NODE_ID, BPR of self preserving inconsistent time, node F removes the value of the original topological database of e port and NODE_ID, BPR, the topology information " E-D-C " of the NODE_LIST in TF1 is write the topological database of w port, and the value of preserving NODE_ID, BPR is the value of NODE_ID, BPR in TF1; The NODE_ID of oneself is write the NODE_LIST of TF1 frame by node F, and the value of TTL is reduced 1, and then TF1 frame is gone out from e port repeat by node F.Node F to the process of the TF2 frame received from e port with similar to the process of the TF1 frame received.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (8)
1. a topological management method for ethernet ring network, is characterized in that, the method comprises:
Node containing port blocked on ring periodically sends Topology Discovery TF frame along intact port, comprise: the node containing port blocked on ring is only when judging transmit port not as port blocked, the node identification NODE_ID of self is write the node identification list NODE_LIST field of TF frame, and the sum of node on the ring is deducted the protocol frame life span ttl field of the value write TF frame of 1, more described TF frame is sent from described transmit port;
In looped network, other node sequence forward TF frame, in forwarding TF frame process, and the nodal information of the information updating self that each node carries according to TF frame, and the information that renewal TF frame carries.
2. the topological management method of ethernet ring network according to claim 1, is characterized in that, the described node containing port blocked on ring sends TF frame along intact port, also comprises:
The node identification NODE_ID of self is write the NODE_ID field of TF frame by the node containing port blocked on ring, and the ring upper port of the state of port blocked write TF frame is blocked mark BPR field.
3. the topological management method of ethernet ring network according to claim 1, is characterized in that, described looped network node forwards TF frame and is specially:
After node receives TF frame, judge that described TF frame receives from port blocked, then abandon described TF frame, flow process terminates; Node judges that described TF frame does not receive from port blocked, then read the relevant field information of described TF frame;
Node judges that the value of NODE_ID, BPR that the NODE_ID field of TF frame, the value of BPR field and node store is unequal, then refresh the topological database of receiving port, topology information in the NODE_LIST of TF frame is write the topological database of this port, and the value of NODE_ID, BPR that self stores is upgraded according to the value of the NODE_ID field of TF frame, BPR field, perform subsequent step afterwards; Node judges that the value of the NODE_ID field of TF frame, BPR field is equal with the value of NODE_ID, BPR that node stores, then directly perform subsequent step;
The NODE_ID of self is write the NODE_LIST field of TF frame by node, and the value of the ttl field of TF frame is reduced 1;
Node judges that the value of the ttl field of TF frame is 0, then flow process terminates; Node judges that the value of the ttl field of TF frame is not 0, then forwarded from another intact ring upper port by described TF frame.
4. the topological management method of the ethernet ring network according to any one of claims 1 to 3, is characterized in that, described port blocked is: the port that the port of man-made obstructions or fault are blocked.
5. a looped network node, it is characterized in that, this looped network node contains port blocked on ring, and described looped network node comprises: TF frame generation unit, TF frame transmitting element, TF frame receiving element, nodal information updating block, memory cell, TF frame updating block and TF frame retransmission unit, wherein
Described TF frame generation unit, for only when judging transmit port not as port blocked, the node identification NODE_ID of described looped network node is write the node identification list NODE_LIST field of TF frame, and the sum of node on the ring is deducted the protocol frame life span ttl field of the value write TF frame of 1, more described TF frame is sent to TF frame transmitting element;
Described TF frame transmitting element, for when looped network node contains port blocked on ring, periodically sends TF frame along intact port;
Described TF frame receiving element, for receiving the TF frame that other looped network nodes send;
Described nodal information updating block, the nodal information of information to cell stores that the TF frame for receiving according to TF frame receiving element carries upgrades;
Described memory cell, for storing the nodal information of looped network node;
Described TF frame updating block, for upgrade TF frame receiving element receive TF frame entrained by information;
Described TF frame retransmission unit, for forwarding the TF frame after the process of TF frame updating block.
6. looped network node according to claim 5, is characterized in that, described TF frame generation unit, also for the NODE_ID of described looped network node being write the NODE_ID field of TF frame, and by the BPR field of the state of port blocked write TF frame;
Described TF frame transmitting element, also for being sent from transmit port by the TF frame from TF frame generation unit.
7. looped network node according to claim 5, is characterized in that,
Described TF frame receiving element, also for judging whether described TF frame receives from port blocked, and TF frame receives from port blocked after reception TF frame, then TF frame receiving element abandons described TF frame; TF frame does not receive from port blocked, then TF frame receiving element reads the relevant field information of described TF frame, and judge that further the value of NODE_ID, BPR that whether the value of the NODE_ID field of TF frame, BPR field stores with node is unequal, the value of NODE_ID, BPR that the NODE_ID field of TF frame, the value of BPR field and node store is unequal, then TF frame receiving element notifying section dot information updating block; The NODE_ID field of TF frame, the value of BPR field are equal with the value of NODE_ID, BPR that node stores, then notify TF frame updating block;
Described nodal information updating block, also for after the notice receiving TF frame receiving element, the topological database of the receiving port that refresh of memory cells stores, topology information in the NODE_LIST of TF frame is write the topological database of this port, and the value of NODE_ID, BPR of cell stores is upgraded according to the value of the NODE_ID field of TF frame, BPR field, after renewal completes, nodal information updating block notice TF frame updating block;
Described TF frame updating block, also for after the notice receiving TF frame receiving element or nodal information updating block, the NODE_ID of looped network node is write the NODE_LIST field of TF frame, the value of the ttl field of TF frame is reduced 1, and the TF frame after upgrading is sent to TF frame retransmission unit;
Described TF frame retransmission unit, also for after receiving the TF frame from TF frame updating block, judges whether the value of the ttl field of described TF frame is 0, and when the value of the ttl field of TF frame is not 0, is forwarded by described TF frame from another intact ring upper port.
8. the looped network node according to any one of claim 5 to 7, is characterized in that, on the ring that looped network node contains, port blocked is: the port that the port of man-made obstructions or fault are blocked.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910236840.7A CN102055635B (en) | 2009-11-02 | 2009-11-02 | TM method for Ethernet ring network and ring network node |
| PCT/CN2010/070272 WO2010145213A1 (en) | 2009-11-02 | 2010-01-21 | Ethernet topology management method and loop network node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910236840.7A CN102055635B (en) | 2009-11-02 | 2009-11-02 | TM method for Ethernet ring network and ring network node |
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| CN102624575B (en) * | 2011-01-28 | 2017-01-25 | 中兴通讯股份有限公司 | Detection method and system for avoiding Ethernet closed loops |
| CN105959227B (en) * | 2016-06-22 | 2019-09-17 | 重庆世纪之光科技实业有限公司 | A kind of the topology learning method, apparatus and system of unidirectional serial bus network |
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| CN1486020A (en) * | 2002-09-23 | 2004-03-31 | 华为技术有限公司 | Mehod for implementing network interconnection management based on asynchronous transmission mode |
| CN1645834A (en) * | 2005-02-02 | 2005-07-27 | 周旭扬 | Method and device for loop discovery, space reuse and protection conversion in MAC bridge connecting network |
| CN101183982A (en) * | 2007-11-21 | 2008-05-21 | 烽火通信科技股份有限公司 | Automatic discovery method based on topological structure of multi-service transmission looped network |
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| US7054951B1 (en) * | 2001-07-02 | 2006-05-30 | Cisco Technology, Inc. | Plug and play node addition in a dual ring topology network using locally significant ring identifiers for determining routing decisions |
| CN101409666B (en) * | 2007-10-12 | 2011-05-04 | 华为技术有限公司 | Ring network, ring network topology discovering method and node |
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| CN1486020A (en) * | 2002-09-23 | 2004-03-31 | 华为技术有限公司 | Mehod for implementing network interconnection management based on asynchronous transmission mode |
| CN1645834A (en) * | 2005-02-02 | 2005-07-27 | 周旭扬 | Method and device for loop discovery, space reuse and protection conversion in MAC bridge connecting network |
| CN101183982A (en) * | 2007-11-21 | 2008-05-21 | 烽火通信科技股份有限公司 | Automatic discovery method based on topological structure of multi-service transmission looped network |
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