CN107819681A - Pseudo-wire load sharing retransmission method and edge router - Google Patents
Pseudo-wire load sharing retransmission method and edge router Download PDFInfo
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- CN107819681A CN107819681A CN201610817700.9A CN201610817700A CN107819681A CN 107819681 A CN107819681 A CN 107819681A CN 201610817700 A CN201610817700 A CN 201610817700A CN 107819681 A CN107819681 A CN 107819681A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
- H04L45/06—Deflection routing, e.g. hot-potato routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
- H04L45/10—Routing in connection-oriented networks, e.g. X.25 or ATM
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
Abstract
The embodiment of the present invention provides a kind of pseudo-wire load sharing retransmission method and PE, is set in local end PE and opposite end PE and polymerize pseudo-wire group, and the source PE and purpose PE of the transmission path of each pseudo-wire member in the polymerization pseudo-wire group are respectively local end PE and opposite end PE.Based on above-mentioned setting, local end PE is after the service message from user equipment is come in reception, target pseudo-wire is used as its selection in real time in each pseudo-wire member polymerizeing in pseudo-wire group according to the currently practical service message received, service message is then forwarded to by opposite end PE by target pseudo-wire.Namely the configuration relation between pseudo-wire in the present invention and service message is not fixed configurations, but according to currently practical service message, flexibly one pseudo-wire for meeting current business message demand of selection is forwarded from polymerization pseudo-wire group, reach the purpose of load sharing forwarding, avoid causing the situation of packet loss to occur because bandwidth transfinites on certain pseudo-wire forward-path.
Description
Technical field
The present invention relates to the communications field, and in particular to a kind of pseudo-wire load sharing retransmission method and edge router.
Background technology
MPLS (Multi-Protocol Label Switching, multiprotocol label switching) technology is a kind of multi-protocols mark
Remember switching technology, three layers of retransmission technique of IP messages are cleverly converted into Layer2 switching technology by it, improve the forwarding speed of data
Rate, so as to the network speed of lifting.,, can be with based on MPLS technology in order to meet the needs of user with the development of the communication technology
VPN (Virtual Private Network, VPN) network is built, according to PE (Provider Edge
Router, edge router) VPN routing forwardings whether are participated in, VPN is divided into two-layer VPN and three-layer VPN.
Carrier network and the VPN of client in two-layer VPN (Layer2MPLS VPN, abbreviation L2VPN) technical solution
It is completely self-contained between network, that is to say, that route switching will not be carried out between the PE equipment and CE equipment of operator edge,
Operator simply simply provides some based on two layers of network function to client.The network of operator and the VPN of client and
Complete framework is on the network model of stacking, and operator merely provides simple two layers of connection from the point of view of client.
This transparent structure for simplifying carrier network and configuration management.
In L2VPN networks, it is as follows to be related to several concepts：
PE：Provider Edge Router, phalanges do online edge router, with user CE (Custom Edge
Router, user network border router) equipment is connected；
P：Provider Router, phalanges are done online core router, are connected with PE, do not docked with CE, are responsible for mpls
Label forwarding；
CE：Custom Edge Router, user network border router, the user being directly connected with service provider set
It is standby；
AC：Access Circuit, access circuit, as the connection between user and service provider, that is, connect CE and
PE link；
PW：Pseudo Wire, pseudowire, the two-way virtual link between example in two PE equipment, it is by one
Unidirectional MPLS VC (Virtual Circuit, virtual circuit) in opposite direction are formed；
Tunnel：Tunnel, for carrying PW, a plurality of PW can be carried on a tunnel, tunnel be a local PE with it is right
The direct channel between PE is held, the data transparent transmission between PE is completed, can be MPLS and gre tunneling；
Outer layer label：For between PE, Tag switching between PE and P, be responsible for message being sent to another PE from a PE
Equipment；
Vpn label：For distinguishing different VPN different connections, PE determines the message which being sent to according to VC labels
CE。
For simplified L2VPN network organizings as shown in figure 1, establishing pseudo-wire PW between PE equipment, dynamic PW passes through LDP
(Label Distribution Protocol, tag distribution protocol) agreement establishes connection, consults PW parameters, distribution forwarding mark
Label.And the configuration between CE business and PW at present is all such as the business of a certain type according to type of service fixed configurations
Fixed configurations are corresponding a certain PW, and all messages of the business are all issued by the PW of the fixation, therefore when the CE equipment of access
Quantity increase, it is excessive the service traffics of a certain PW carrying easily occur, and bandwidth is limited on forward-path on the way by the PW, it may appear that
The out-of-limit situation of flow bandwidth, causes business packet loss, influences to communicate, satisfaction of users is low
The content of the invention
A kind of pseudo-wire load sharing retransmission method and edge router provided in an embodiment of the present invention, the technical problem that principal solution is determined
It is：The problem of solving bandwidth deficiency causes packet loss, influences proper communication, and satisfaction of users is low.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of pseudo-wire load sharing retransmission method, including：
Receive the service message from user equipment；
One is selected to be used as target pseudo-wire in each pseudo-wire member polymerizeing in pseudo-wire group according to the service message；It is described
Polymerizeing pseudo-wire group is：What local terminal edge router and end edges router were pre-set belongs to same virtual private network (VPN) examples
Pseudo-wire set, source edge router and purpose the edge router difference of the transmission path of each pseudo-wire member in the pseudo-wire set
For local terminal edge router and end edges router, and local terminal edge router is the entrance of the service message, to end edge
Edge router is the outlet of the service message；
The service message is forwarded to by the end edges router by the target pseudo-wire.
The embodiment of the present invention also provides a kind of edge router, including：
Message receiving module, for receiving the service message from user equipment；
Pseudo-wire selecting module, for selecting one in each pseudo-wire member polymerizeing in pseudo-wire group according to the service message
As target pseudo-wire；It is described polymerization pseudo-wire group be：What local terminal edge router and end edges router were pre-set belongs to same
The pseudo-wire set of one virtual private network (VPN) examples, the source edge router of the transmission path of each pseudo-wire member in the pseudo-wire set and
Purpose edge router is respectively local terminal edge router and end edges router, and local terminal edge router is the business
The entrance of message, end edges router are the outlet of the service message；
Packet forwarding module, it is route for the service message to be forwarded into the end edges by the target pseudo-wire
Device.
The embodiment of the present invention also provides a kind of computer-readable storage medium, and computer is stored with the computer-readable storage medium
Executable instruction, the computer executable instructions are used to perform foregoing pseudo-wire load sharing retransmission method.
The beneficial effects of the invention are as follows：
Pseudo-wire load sharing retransmission method, edge router and the computer-readable storage medium provided according to embodiments of the present invention,
Polymerization pseudo-wire group first is set in local terminal edge router and end edges router, the polymerization pseudo-wire group is pseudo-wire set, the puppet
The source edge router and purpose edge router of the transmission path of each pseudo-wire member in line set are respectively this end margin road
By device and end edges router.Based on above-mentioned setting, local terminal edge router comes the business report from user equipment in reception
Wen Hou, one is selected in real time for it in each pseudo-wire member polymerizeing in pseudo-wire group according to the currently practical service message received
It is individual to be used as target pseudo-wire, service message is then forwarded to by end edges router by target pseudo-wire.Namely in the present invention
Configuration relation between pseudo-wire and service message is not fixed configurations, but flexible according to currently practical service message
From polymerization pseudo-wire group in selection one pseudo-wire for meeting current business message demand forwarded, avoid on pseudo-wire forward-path because
Bandwidth, which transfinites, causes the situation of packet loss to occur, and lifts the reliability of communication, and can lift the satisfaction of Consumer's Experience.
Brief description of the drawings
Fig. 1 is a kind of L2VPN network organizings schematic diagram；
Fig. 2 is the pseudo-wire load sharing retransmission method schematic flow sheet in the embodiment of the present invention one；
Fig. 3 is the schematic flow sheet of the configuration dynamic aggregation pseudo-wire group in the embodiment of the present invention one；
Fig. 4 is the edge router structural representation in the embodiment of the present invention two；
Fig. 5 is the other edge router topology schematic diagram in the embodiment of the present invention two；
Fig. 6 is the other edge router topology schematic diagram in the embodiment of the present invention two；
Fig. 7 is the schematic flow sheet of the setting dynamic aggregation pseudo-wire group in the embodiment of the present invention three；
Fig. 8 is the schematic flow sheet to be E-Packeted using dynamic aggregation pseudo-wire group in the embodiment of the present invention three；
Fig. 9 is the schematic flow sheet of the dynamic aggregation pseudo-wire group abnormality processing in the embodiment of the present invention three；
Figure 10 is the edge router structural representation in the embodiment of the present invention three.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is part of the embodiment in the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Embodiment one：
Service traffics are excessive to cause bandwidth to transfinite to the present embodiment in order to solve on pseudo-wire PW forward-paths, and then causes packet loss
The problem of.Polymerization pseudo-wire group is pre-set between edge router PE, for the ease of statement, the two PE are referred to as separately below
Local end PE and opposite end PE, have mulitpath reachable between local end PE and opposite end PE.The present embodiment is set in local end PE and opposite end PE
The polymerization pseudo-wire group put is：The pseudo-wire set that local end PE and opposite end PE are pre-set, the pseudo-wire set belong to same virtual private
Net example (VPN), and the source PE and purpose PE of the transmission path of each pseudo-wire member in the pseudo-wire set be respectively local end PE and
Opposite end PE, namely the entrance that local end PE is service message, opposite end PE are the outlet of the service message.
Based on above-mentioned setting, after local end PE receives the service message from L2VPN user equipmenies CE, according to above-mentioned
Binding relationship selection corresponding to pseudo-wire aggregation group, further according to user service message from polymerization pseudo-wire group in each pseudo-wire member in
Selection one is used as target pseudo-wire, and then the service message is transmitted into opposite end PE by the target pseudo-wire.So the present invention is logical
Each service message of the flexible shared of pseudo-wire member from CE crossed in polymerization pseudo-wire group, it is relatively existing according to type of service
Wall scroll PW situation is bound, the load pressure of wall scroll pseudo-wire can be reduced, can more reasonably be carried more under same physical bandwidth
Various flow, reach the effect of similar physical upgrade bandwidth, but cost can be reduced simultaneously, lift resource utilization.
It should be appreciated that the polymerization pseudo-wire group configured on local end PE and opposite end PE can be included in local end PE and opposite end PE
All pseudo-wires of configuration, it can also only include a part for the pseudo-wire configured in local end PE and opposite end PE.Below based on above-mentioned poly-
The setting of pseudo-wire group is closed, the repeating process that service message is received using local end PE illustrates as example.It is shown in Figure 2, bag
Include：
S201：Receive the service message from user equipment.
S202：One is selected as target puppet in each pseudo-wire member polymerizeing in pseudo-wire group according to service message content
Line.
S203：The service message is forwarded to by opposite end PE by target pseudo-wire.
The polymerization pseudo-wire group configured in the present embodiment on PE can include static (static) and polymerize pseudo-wire group and dynamic
(dynamic) it polymerize at least one of pseudo-wire group.When configuring static polymerization pseudo-wire group, it is not required between local end PE and opposite end PE
Consult, and need to carry out pseudo-wire member's negotiation between local end PE and opposite end PE when configuring dynamic aggregation pseudo-wire group.In order to just
In understanding the present invention, said separately below using the configuration process of dynamic aggregation pseudo-wire group and static polymerization pseudo-wire group as example
It is bright.
When the polymerization pseudo-wire group in the present embodiment includes dynamic aggregation pseudo-wire group, the process ginseng of configuration dynamic aggregation pseudo-wire group
As shown in Figure 3, including：
S301：Dynamic pseudo-wire configuration information is received, and obtains dynamic aggregation attribute information.
Pseudo-wire to be configured is included in dynamic pseudo-wire configuration information in the present embodiment, the dynamic pseudo-wire configuration information can be
User configuration issues.
Dynamic aggregation attribute information can also be that user configuration issues in the present embodiment, or based in configuration process first
The attribute information of the individual pseudo-wire member for adding dynamic aggregation pseudo-wire group obtains.
S302：Using in pseudo-wire to be configured with the pseudo-wire that dynamic aggregation attribute information matches as choosing (selected) pseudo-wire
Add dynamic aggregation pseudo-wire group.
In local end PE carries out above-mentioned configuration process, opposite end PE similarly carries out above-mentioned configuration process.
S303：With opposite end PE consult, by local end PE dynamic aggregation pseudo-wire group with institute in the PE dynamic aggregation pseudo-wire groups of opposite end
Shared chooses pseudo-wire to add respective dynamic aggregation pseudo-wire group as pseudo-wire member, and sets the work shape of pseudo-wire member
State.
The dynamic aggregation attribute information of the present embodiment includes but is not limited to：Polymerization pseudo-wire group mark (polymerization belonging to pseudo-wire
Pseudo-wire group id), the purpose PE addresses (peer-ip) of pseudo-wire, pseudo- ray mode (pw-mode) be dynamic mode (dynamic), pseudo-wire
Type (pw-type), pseudo-wire bandwidth and pseudo-wire control word (pw-class).Above dynamic aggregation attribute information can be by user
Configuration distributing, it will can also be defined as on the basis of the above-mentioned property parameters of the pseudo-wire member of first addition dynamic aggregation pseudo-wire group
Dynamic aggregation attribute information.
In above-mentioned S302, for each pseudo-wire to be configured, only its attribute matched with above-mentioned dynamic aggregation attribute information (namely
Pseudo-wire unanimously), it can just be arranged to choose (selected) state.And it can be seen from above-mentioned analysis, it is dynamic in the present embodiment
The pw-mode of each pseudo-wire member in state polymerization pseudo-wire group is necessary for dynamic, i.e., only supports dynamic PW.
In the present embodiment, the negotiation between local end PE and opposite end PE needs a side to initiate, and embodiment selects IP in two PE
The big side in address initiates, namely when the IP address of local end PE is more than opposite end PE IP address, then by local end PE as drive end,
Initiate to consult, opposite end PE is as Partner, conversely, then opposite end PE initiates to consult, local end PE is as Partner as drive end.
Negotiations process for above-mentioned S302, the present embodiment is then with drive end (being probably local end PE, it is also possible to opposite end PE) and passive
End (being probably opposite end PE accordingly, it is also possible to local end PE) illustrates for example.
Drive end using in pseudo-wire to be configured with the pseudo-wire that dynamic aggregation attribute information matches as choosing (selected) pseudo-
After line adds dynamic aggregation pseudo-wire group, each pseudo-wire information about firms in the dynamic aggregation group of local terminal for selected state is issued into opposite end
(can be held consultation by LDP protocol massages)；After Partner receives, by local terminal dynamic aggregation pseudo-wire group with drive end identical
The working condition of the pseudo-wire member of each selected state is arranged to activate (active), and these pseudo-wire information about firms are fed back into master
Moved end, drive end receive after compared with each pseudo-wire member in local terminal dynamic aggregation group, be arranged to according to opposite end
Active pseudo-wire member, the same pseudo-wire of local terminal is also configured as active.Afterwards can between drive end and Partner
Regularly to send keep-alive message, state keep-alive is carried out.
In the present embodiment, after setting dynamic aggregation pseudo-wire group based on above-mentioned negotiations process, in addition to：
Drive end or Partner detect port change and/or the shape of a certain pseudo-wire member of local terminal dynamic aggregation pseudo-wire group
During state exception, pseudo-wire member is removed from dynamic aggregation pseudo-wire group, and notifies opposite end PE by pseudo-wire member from opposite end
Removed in dynamic aggregation pseudo-wire group.Pseudo-wire member is removed from dynamic aggregation pseudo-wire in the present embodiment and included but is not limited to：Will
Pseudo-wire member is arranged to unselected, and the state of pseudo-wire member is changed into inactive (unactive).
In addition, in the present embodiment, the forward mode of dynamic aggregation pseudo-wire group itself can also be set, the forward mode includes
But it is not limited to：Active and standby forward mode and load sharing pattern.Under active and standby forward mode, each pseudo-wire in dynamic aggregation pseudo-wire group
In member, only one configuration is main pseudo-wire, and other pseudo-wires are standby pseudo-wire.Under load sharing pattern, dynamic aggregation pseudo-wire group
As long as the working condition of each pseudo-wire member in is active, it is possible to carries out flow forwarding.Now, set in above-mentioned S303 pseudo-
The working condition of line member includes：
Under active and standby forward mode：If the pseudo-wire member currently added is main pseudo-wire and its state is UP, the puppet is set
The working condition of line member is state of activation active；If the pseudo-wire member currently added is standby pseudo-wire and its state is UP,
Pseudo-wire member is set to prepare state of activation reactive；If the pseudo-wire member condition currently added is abnormal, setting should
The working condition of pseudo-wire member is unactivated state unactive；
Under load sharing pattern：If it is UP for the pseudo-wire member condition of selected states currently to add, set
The working condition of pseudo-wire member is state of activation active；If the pseudo-wire member condition currently added is abnormal (bag
It is down to include but be not limited to state), the working condition for setting pseudo-wire member is unactivated state unactive.
When polymerization pseudo-wire group includes static polymerization pseudo-wire group, static polymerization pseudo-wire group is set to include：
Local end PE receives static pseudo-wire configuration information, and obtains static polymerization attribute information；In static pseudo-wire configuration information
Include pseudo-wire to be configured；Static pseudo-wire configuration information can also be that user configuration issues in the present embodiment, static polymerization attribute letter
Breath can be identical with above-mentioned dynamic aggregation attribute information.
It is pseudo- using static polymerization is added with the pseudo-wire that static polymerization attribute information matches as pseudo-wire member in pseudo-wire to be configured
Line group, and the working condition of pseudo-wire member is set.Corresponding, the static polymerization attribute information in the present embodiment includes but unlimited
In：Polymerization pseudo-wire group mark (polymerization pseudo-wire group id) belonging to pseudo-wire, the purpose PE addresses (peer-ip) of pseudo-wire, pseudo- ray mode
(pw-mode) it is static schema (static), pseudo-wire type (pw-type), pseudo-wire bandwidth and pseudo-wire control word (pw-
class)。
For static polymerization pseudo-wire group, setting the working condition of pseudo-wire member also includes：
Under active and standby forward mode：If the pseudo-wire member currently added is main pseudo-wire and its state is UP, the puppet is set
The working condition of line member is state of activation active；If the pseudo-wire member currently added is standby pseudo-wire and its state is UP,
Pseudo-wire member is set to prepare state of activation reactive；If the pseudo-wire member condition currently added is abnormal, setting should
The working condition of pseudo-wire member is unactivated state unactive；
Under load sharing pattern：If it is UP for the pseudo-wire member condition of selected states currently to add, set
The working condition of pseudo-wire member is state of activation active；If the pseudo-wire member condition currently added is abnormal (bag
It is down to include but be not limited to state), the working condition for setting pseudo-wire member is unactivated state unactive.
In the present embodiment, after local end PE receives the service message from CE, when local end PE is provided with dynamic aggregation pseudo-wire group
During with static polymerization pseudo-wire group, according to the forward-path of the service message, it may be in dynamic aggregation pseudo-wire group and static polymerization
A pseudo-wire member is selected as target pseudo-wire in any one polymerization pseudo-wire group in pseudo-wire group, it is also possible to adopts polymerization pseudo-wire group
Outside pseudo-wire carry out the forwarding of the service message.When polymerization pseudo-wire group or static polymerization pseudo-wire group in select a pseudo-wire into
When member is used as target pseudo-wire, including：
In the case where polymerization pseudo-wire group is active and standby forward mode, the main pseudo-wire in selective polymerization pseudo-wire group is as target pseudo-wire；
It is user vlan (the Virtual Local in service message under load sharing pattern in polymerization pseudo-wire group
Area Network, VLAN) or mac addresses (physical address) from polymerization pseudo-wire group in each working condition for activation
One is selected in pseudo-wire member and is used as target pseudo-wire., specifically can be according to the user vlan or mac of service message in the present embodiment
Address determines to want the destination address (may further determine that source address) of service message, is the industry according to destination address (or with reference to source address)
Message one pseudo-wire member of selection be engaged in as target pseudo-wire, and for the service message with identical destination address preferably using same
One pseudo-wire member is forwarded.
In the present embodiment, in also settable dynamic aggregation pseudo-wire group and/or static polymerization pseudo-wire group actvie pseudo-wire into
The minimum number min-number of member, when local end PE or opposite end PE monitor that local dynamic aggregation pseudo-wire group and/or static state are poly-
When the pseudo-wire member for closing actvie in pseudo-wire group is less than minimum number min-number, by dynamic aggregation pseudo-wire group and/or static state
The working condition of polymerization pseudo-wire group is arranged to down, and now dynamic aggregation pseudo-wire group and/or static polymerization pseudo-wire group stop forwarding
Message.The occurrence of min-number in the present embodiment can flexibly be set according to concrete application scene, and the present embodiment can be with
It is arranged to 1.
The pseudo-wire load sharing retransmission method that the present embodiment provides can solve the problems, such as that link bandwidth is inadequate by polymerizeing PW, and
Band width in physical upgrading need not be carried out, cost can be reduced to a certain extent, and can lifting resource utilization, can also be protected
Shield forwarding, the satisfaction of Consumer's Experience can be lifted.
Embodiment two：
The present embodiment additionally provides a kind of edge router (PE, the PE is local end PE in the present embodiment), referring to Fig. 4 institutes
Show, including：
Message receiving module 41, for receiving the service message from user equipment；
Pseudo-wire selecting module 42, for selecting one in each pseudo-wire member polymerizeing in pseudo-wire group according to service message content
It is individual to be used as target pseudo-wire；The polymerization pseudo-wire group is：What local end PE and opposite end PE were pre-set belongs to same virtual private network (VPN) examples
Pseudo-wire set, the source PE and purpose PE of the transmission path of each pseudo-wire member in the pseudo-wire set are respectively local end PE and opposite end
PE, and local end PE and opposite end PE be on the forward-path of the service message, namely the entrance that local end PE is service message, opposite end
PE is the outlet of service message.
Packet forwarding module 43, for service message to be forwarded into opposite end PE by target pseudo-wire.It should be appreciated that should
The purpose PE of service message forward-path is probably above-mentioned opposite end PE, it is also possible to is not above-mentioned opposite end PE.So the present invention passes through
Each service message of the flexible shared of pseudo-wire member from CE polymerizeing in pseudo-wire group, it is relatively existing to be tied up according to type of service
Order bar PW situation, the load pressure of wall scroll pseudo-wire can be reduced, can more reasonably be carried under same physical bandwidth more
Flow, reach the effect of similar physical upgrade bandwidth, but cost can be reduced simultaneously, lift resource utilization.
It should be appreciated that the polymerization pseudo-wire group configured on local end PE and opposite end PE can be included in local end PE and opposite end PE
All pseudo-wires of configuration, it can also only include a part for the pseudo-wire configured in local end PE and opposite end PE.In PE in the present embodiment
The polymerization pseudo-wire group of upper configuration can include static (static) and polymerize in pseudo-wire group and dynamic (dynamic) polymerization pseudo-wire group
It is at least one.When configuring static polymerization pseudo-wire group, need not consult between local end PE and opposite end PE, and in configuration dynamic aggregation
Need to carry out pseudo-wire member's negotiation between local end PE and opposite end PE during pseudo-wire group.For the ease of understand the present invention, separately below with
The configuration process of dynamic aggregation pseudo-wire group and static polymerization pseudo-wire group illustrates for example.
When polymerization pseudo-wire group includes static polymerization pseudo-wire group, shown in Figure 5, PE is also assembled including static polymerization pseudo-wire and put
Module 44, for receiving static pseudo-wire configuration information, and obtain static polymerization attribute information；Included in static pseudo-wire configuration information
Pseudo-wire to be configured；Static polymerization pseudo-wire group configuration module 44 is additionally operable to match with static polymerization attribute information in pseudo-wire to be configured
Pseudo-wire add static polymerization pseudo-wire group as pseudo-wire member, and the working condition of pseudo-wire member is set.In the present embodiment
Static polymerization attribute information includes but is not limited to：Polymerization pseudo-wire group mark (polymerization pseudo-wire group id) belonging to pseudo-wire, the mesh of pseudo-wire
PE addresses (peer-ip), pseudo- ray mode (pw-mode) be static schema (static), pseudo-wire type (pw-type), pseudo-wire
Bandwidth and pseudo-wire control word (pw-class).
In addition, in the present embodiment, the forward mode of static polymerization pseudo-wire group itself can also be set, the forward mode includes
But it is not limited to：Active and standby forward mode and load sharing pattern.Under active and standby forward mode, each pseudo-wire in static polymerization pseudo-wire group
In member, only one configuration is main pseudo-wire, and other pseudo-wires are standby pseudo-wire.Under load sharing pattern, static polymerization pseudo-wire group
As long as the working condition of each pseudo-wire member in is active, it is possible to carries out flow forwarding.Now, static polymerization pseudo-wire assembles
Putting module 44 sets the working condition of pseudo-wire member to include：
Under active and standby forward mode：If the pseudo-wire member currently added is main pseudo-wire and its state is UP, the puppet is set
The working condition of line member is state of activation active；If the pseudo-wire member currently added is standby pseudo-wire and its state is UP,
Pseudo-wire member is set to prepare state of activation reactive；If the pseudo-wire member condition currently added is abnormal, setting should
The working condition of pseudo-wire member is unactivated state unactive；
Under load sharing pattern：If it is UP for the pseudo-wire member condition of selected states currently to add, set
The working condition of pseudo-wire member is state of activation active；If the pseudo-wire member condition currently added is abnormal (bag
It is down to include but be not limited to state), the working condition for setting pseudo-wire member is unactivated state unactive.
Referring also to shown in Fig. 5, when polymerization pseudo-wire group includes dynamic aggregation pseudo-wire group, PE also assembles including dynamic aggregation pseudo-wire
Module 45 is put, for receiving the dynamic pseudo-wire configuration information for including pseudo-wire to be configured, and obtains dynamic aggregation attribute information；Dynamically
Polymerization pseudo-wire group configuration module 45 be additionally operable to using in pseudo-wire to be configured with the pseudo-wire that dynamic aggregation attribute information matches as choosing
Pseudo-wire adds dynamic aggregation pseudo-wire group, and consults with opposite end PE, will be poly- with opposite end PE dynamics in local end PE dynamic aggregation pseudo-wire group
Close and choose pseudo-wire as the respective dynamic aggregation pseudo-wire group of pseudo-wire member addition common in pseudo-wire group, and set the pseudo-wire into
The working condition of member.
Dynamic pseudo-wire configuration information can be that user configuration issues in the present embodiment.Dynamic aggregation attribute is believed in the present embodiment
Breath can also be that user configuration issues, or dynamic aggregation pseudo-wire group configuration module 45 is based on first addition in configuration process and moved
The attribute information of the pseudo-wire member of state polymerization pseudo-wire group obtains.
The dynamic aggregation attribute information of the present embodiment includes but is not limited to：Polymerization pseudo-wire group mark (polymerization belonging to pseudo-wire
Pseudo-wire group id), the purpose PE addresses (peer-ip) of pseudo-wire, pseudo- ray mode (pw-mode) be dynamic mode (dynamic), pseudo-wire
Type (pw-type), pseudo-wire bandwidth and pseudo-wire control word (pw-class).Above dynamic aggregation attribute information can be by user
Configuration distributing, it will can also be defined as on the basis of the above-mentioned property parameters of the pseudo-wire member of first addition dynamic aggregation pseudo-wire group
Dynamic aggregation attribute information.
For each pseudo-wire to be configured, only its attribute matches the puppet of (namely consistent) with above-mentioned dynamic aggregation attribute information
Line, it can just be arranged to choose (selected) state.And it can be seen from above-mentioned analysis, the dynamic aggregation pseudo-wire in the present embodiment
The pw-mode of each pseudo-wire member in group is necessary for dynamic, i.e., only supports dynamic PW.
In the present embodiment, the negotiation between local end PE and opposite end PE needs a side to initiate, and embodiment selects IP in two PE
The big side in address initiates, namely when the IP address of local end PE is more than opposite end PE IP address, then by local end PE as drive end,
Initiate to consult, opposite end PE is as Partner, conversely, then opposite end PE initiates to consult, local end PE is as Partner as drive end.
For above-mentioned negotiations process, the present embodiment is then (corresponding with drive end (being probably local end PE, it is also possible to opposite end PE) and Partner
Be probably opposite end PE, it is also possible to local end PE) illustrated for example.
The dynamic aggregation pseudo-wire group configuration module of drive end will match in pseudo-wire to be configured with dynamic aggregation attribute information
To be selected state in the dynamic aggregation group of local terminal after pseudo-wire is as choosing (selected) pseudo-wire to add dynamic aggregation pseudo-wire group
Each pseudo-wire information about firms issue opposite end (can be held consultation by LDP protocol massages)；The dynamic aggregation pseudo-wire of Partner assembles
Put after module receives, by the work shape in local terminal dynamic aggregation pseudo-wire group with the pseudo-wire member of each selected state of drive end identical
State is arranged to activate (active), and these pseudo-wire information about firms are fed back into drive end, the dynamic aggregation pseudo-wire group of drive end
Configuration module receive after compared with each pseudo-wire member in local terminal dynamic aggregation group, be arranged to active's according to opposite end
Pseudo-wire member, the same pseudo-wire of local terminal is also configured as active.Can regularly it be sent out between drive end and Partner afterwards
Keep-alive message is sent, carries out state keep-alive.
For dynamic aggregation pseudo-wire group, dynamic aggregation pseudo-wire group configuration module 45 sets the working condition of pseudo-wire member also to wrap
Include：
Under active and standby forward mode：If the pseudo-wire member currently added is main pseudo-wire and its state is UP, the puppet is set
The working condition of line member is state of activation active；If the pseudo-wire member currently added is standby pseudo-wire and its state is UP,
Pseudo-wire member is set to prepare state of activation reactive；If the pseudo-wire member condition currently added is abnormal, setting should
The working condition of pseudo-wire member is unactivated state unactive；
Under load sharing pattern：If it is UP for the pseudo-wire member condition of selected states currently to add, set
The working condition of pseudo-wire member is state of activation active；If the pseudo-wire member condition currently added is abnormal (bag
It is down to include but be not limited to state), the working condition for setting pseudo-wire member is unactivated state unactive.
In the present embodiment, PE also includes member's update module 46, shown in Figure 6.Member's update module 46 is used to be based on
After above-mentioned negotiations process sets dynamic aggregation pseudo-wire group, a certain pseudo-wire member of local end PE dynamic aggregation pseudo-wire group is detected
Port change and/or during abnormal state, pseudo-wire member is removed from dynamic aggregation pseudo-wire group, and notify that opposite end PE should
Pseudo-wire member removes from the dynamic aggregation pseudo-wire group of opposite end.In the present embodiment member's update module 46 by pseudo-wire member from dynamic
Remove and include but is not limited in polymerization pseudo-wire：Pseudo-wire member is arranged to unselected, and by the state of pseudo-wire member
It is changed into inactive (unactive).
Referring also to shown in Fig. 6, the PE in the present embodiment may also include aggregation group state monitoring module 47, for setting dynamic
It polymerize the minimum number min-number of actvie pseudo-wire member in pseudo-wire group and/or static polymerization pseudo-wire group, when monitoring
Actvie pseudo-wire member is less than minimum number min- in the dynamic aggregation pseudo-wire group and/or static polymerization pseudo-wire group of local end PE
During number, the working condition of dynamic aggregation pseudo-wire group and/or static polymerization pseudo-wire group is arranged to down, now dynamic aggregation
Pseudo-wire group and/or static polymerization pseudo-wire group stop forwarding message.The occurrence of min-number in the present embodiment can basis
Concrete application scene is flexibly set, and the present embodiment could be arranged to 1.
The function of above-mentioned each module in embodiment can be realized by the controller or processing of router interior.And ability
The technical staff in domain should be understood that each module of the embodiments of the present invention or each step can be with general computing devices come real
Existing, they can be concentrated on single computing device, or are distributed on the network that multiple computing devices are formed, optional
Ground, they can be realized with the program code that computing device can perform, and be situated between it is thus possible to be stored in computer storage
Performed in matter (ROM/RAM, magnetic disc, CD) by computing device, and in some cases, can be with suitable different from herein
Sequence performs shown or described step, they is either fabricated to each integrated circuit modules respectively or by them
Multiple modules or step are fabricated to single integrated circuit module to realize.So the present invention is not restricted to any specific hardware
Combined with software.
Embodiment three：
For the ease of understanding the present invention, the present embodiment is done further using the networking scene shown in Fig. 1 as example to the present invention
Illustrate.
Basic MPLS L2VPN networks are disposed in Fig. 1 network, from RSVP TE (Resource
ReSerVation Protocol-Traffic Engineering) agreement disposes tunnel, and outer layer label is distributed, form data
Forward-path.Pseudo-wire PW distributes vpn label by LDP agreement link setups.Assuming that user CE1 and CE4 are both needed to be led to CE2
Letter, centre pass through backbone device PE1, P and PE2, by the L2VPN networks between PE1, PE2, form exclusive private network
Passage.
If user CE1 and CE4 portfolio are very big, communication flows occupies substantial amounts of bandwidth, in PE1-P-PE2 links
On, bandwidth is out-of-limit, the phenomenon of packet loss occurs, has had a strong impact on the Web vector graphic behavior of user.Therefore need to increase over the backbone
Add along road bandwidth.Scheme of the present embodiment based on the various embodiments described above introduces a kind of PW load sharing mode, can effectively solve
Certainly this problem, it is not necessary to increase physical link.In addition this method also has the effect for protecting PW, illustrates below as follows：
In L2VPN networks, two pseudo-wires PW1, PW2 are established between two PE, this two PW are bundled in polymerization PW groups
In, polymerization PW groups represent that two PW are pw-group members with pw-group, and PW1 and PW2 path can be different.Such as
Shown in Fig. 1, it is assumed that L2VPN is established between PE1 and PE2, realizes the communication between CE1CE4CE2.PW1 path can pass through
Tunnel tunnels select PE1-P-PE2, PW2 Path selection PE1-PE3-PE2, pw- are configured in PE1 and PE2 equipment
Group, two PW are aggregated into a PW group.In pw-group, two PW realize load sharing, reduce single link
Load pressure.
It can be seen from the introduction of above-described embodiment, Pw-group is divided to for two kinds of polymerizations of dynamic dynamic and static static
Mode, static mode do not need protocol negotiation, and dynamical fashion needs protocol negotiation member PW state.Member PW state has three
Kind, one kind is active, and one kind is unactive, and also one kind is exclusively used under protected mode (namely active and standby forward mode)
Standby PW's, represented with reactive.For static polymerization, when PW is in up states in itself, and local PW is selected,
Member PW under pw-group is active, and when PW is in abnormality, then member PW is in unactive states.Dynamic is poly-
Under conjunction mode, member PW state is held consultation by agreement.
And it should be appreciated that under Pw-group, member PW can be increased, that realizes a plurality of PW shares mode.Can be with
Configuration member's minimum value.It is less than minimum value when member PW is in number under active, then pw-group states are down, polymerize PW
Forwarded without flow.
Pw-group pass-through mode can be divided into two kinds, and one kind is load sharing pattern, and one kind is active and standby forward mode.
Under load sharing pattern, each member PW can be carried out flow and forward, and under active and standby forward mode, only a PW is in forwarding
Under state, other PW are stand-by states, therefore the pseudo-wire member under the pattern can only configure two.
Pw-group load sharing mode has two kinds, and one kind is to carry out sharing forwarding based on user vlan, and one kind is base
Carry out sharing forwarding in mac addresses.
It is made up of the inside of edge router in the present embodiment shown in Figure 10.Below with Pw-group dynamic aggregations
Process, and using PE1 as local end PE, PE2 is that opposite end PE is that example illustrates, it is shown in Figure 7 including：
S701：Drive end and Partner, the IP address of equipment local end PE and opposite end PE IP address election are selected, judges this
Whether end IP address is more than peer IP address, in this way, goes to S702, otherwise, goes to S704.
S702：Local end PE obtains dynamic aggregation pseudo-wire group attribute message, and the pseudo-wire of matching is selected from pseudo-wire to be configured
Member is arranged to selected.
S703：Local end PE sends negotiation packet and gives opposite end PE, waits opposite end to reply negotiation packet, if opposite end is at one section
It is interior not reply, negotiation packet can be resend, goes to S706.
S704：Opposite end PE obtains dynamic aggregation pseudo-wire group attribute message, and the pseudo-wire of matching is selected from pseudo-wire to be configured
Member is arranged to selected.
S705：Opposite end PE sends negotiation packet to local end PE, waits opposite end to reply negotiation packet, if opposite end is at one section
It is interior not reply, negotiation packet can be resend, goes to S706.
S706：Whether the unified PW member for judging local end PE and opposite end PE is all selected, in this way, goes to S707；It is no
Then, S710 is gone to.
S707：Whether the unified PW member conditions for judging local end PE and opposite end PE are all UP, in this way, go to S708；Otherwise,
Go to S710.
S708：Pseudo-wire member's working condition is arranged to active.
S709：Judge that working condition in Pw-group is arranged to active pseudo-wire number of members and whether is less than min-
Number, in this way, S711 is gone to, otherwise, go to S712.
S710：Setting pseudo-wire is active, returns to S706 and judges next pseudo-wire member.
S711：Pw-group state is arranged to down.
S712：Pw-group state is arranged to up.
For Pw-group static polymerization compared with said process, in the absence of the process of protocol negotiation, member PW additions
To pw-group, as long as PW is up, you can carry out flow forwarding.
Minimum active PW quantity can be configured under pw-group, when the quantity of PW active states is less than min-
Number, pw-group report down, and aggregation group stops forwarding flow.The value for giving tacit consent to min-number is 1.
After setting pw-group based on the process shown in Fig. 7, the process that PE is forwarded using the pw-group is joined
As shown in Figure 8, including：
S801：Whether the state for judging pw-group is UP, if down, goes to S802, otherwise goes to S803.
S802：Flow is forbidden to forward.
S803：Judge whether pw-group forwarding capabilitys are opened, it is such as no, S802 is gone to, otherwise, goes to S804.
S804：Whether the mode of operation for judging pw-group is active and standby forward mode, in this way, goes to S805；Otherwise, go to
S806。
S805：Pw-group main pseudo-wire is selected as target pseudo-wire converting flow.
S806：Judge whether load balancing mode is to be based on source/destination mac addresses, in this way, goes to S807, otherwise, goes to
S808；
S807：A pseudo-wire member is selected as mesh from the different PW principles forwarded according to the different message in mac addresses
Mark pseudo-wire is forwarded.
S808:Select a pseudo-wire member pseudo- as target from the different PW principles forwarded according to messages different vlan
Line is forwarded.
It is shown in Figure 9 for pw-group member's exception handling procedure, including：
Walk S901：Receive abnormal conditions.
S902：Judge whether abnormal be that member PW reports down, in this way, go to S903；Otherwise, S905 is gone to.
S903：The PW member is arranged to unactive.
S904：The forwarding capability of the PW member is closed, goes to S909.
S905：Show that the PW member is removed, the PW member is reported into down.
S906：The forwarding outlet under the PW member is removed from pw-group, PW member's forwarding capability is closed, goes to
S909。
S907：Opposite end PE detects that the PW member conditions are down, and PW states are arranged into unactive.
S908：The forwarding capability of the PW member is closed, goes to S909.
S909：Check whether the number that the PW member in local pw-group is active is less than min-number, in this way,
S911 is gone to, otherwise, goes to S910.
S910：Continue forwarding data packets.
S911：Pw-group is arranged to down, closes forwarding.
The problem of the present embodiment is solved when link bandwidth is inadequate, and extension is along road bandwidth from software, can save resource,
Conversion link can also be protected.
Above content is to combine the further description that specific embodiment is made to the embodiment of the present invention, it is impossible to is recognized
The specific implementation of the fixed present invention is confined to these explanations.For general technical staff of the technical field of the invention,
Without departing from the inventive concept of the premise, some simple deduction or replace can also be made, should all be considered as belonging to the present invention
Protection domain.
Claims (11)
1. a kind of pseudo-wire load sharing retransmission method, including：
Receive the service message from user equipment；
One is selected to be used as target pseudo-wire in each pseudo-wire member polymerizeing in pseudo-wire group according to the service message；The polymerization
Pseudo-wire group is：The pseudo-wire for belonging to same virtual private network (VPN) examples that local terminal edge router and end edges router are pre-set
Set, the source edge router and purpose edge router of the transmission path of each pseudo-wire member in the pseudo-wire set are respectively this
End margin router and end edges router, and local terminal edge router be the service message entrance, end edges road
By the outlet that device is the service message；
The service message is forwarded to by the end edges router by the target pseudo-wire.
2. pseudo-wire load sharing retransmission method as claimed in claim 1, it is characterised in that the polymerization pseudo-wire group includes static polymerization
Pseudo-wire group；Static polymerization pseudo-wire group is set to include：
Static pseudo-wire configuration information is received, and obtains static polymerization attribute information；Include and treat in the static pseudo-wire configuration information
Configure pseudo-wire；
It is static poly- using being added in the pseudo-wire to be configured with the pseudo-wire that the static polymerization attribute information matches as pseudo-wire member
Pseudo-wire group is closed, and the working condition of pseudo-wire member is set.
3. pseudo-wire load sharing retransmission method as claimed in claim 2, it is characterised in that the static polymerization attribute information includes：
Polymerization pseudo-wire group mark, the purpose edge router address of pseudo-wire, pseudo- ray mode belonging to pseudo-wire are static schema, pseudo-wire class
Type, pseudo-wire bandwidth and pseudo-wire control word.
4. pseudo-wire load sharing retransmission method as claimed in claim 1, it is characterised in that the polymerization pseudo-wire group includes dynamic aggregation
Pseudo-wire group, dynamic aggregation pseudo-wire group is set to include：
Dynamic pseudo-wire configuration information is received, and obtains dynamic aggregation attribute information, includes and treats in the dynamic pseudo-wire configuration information
Configure pseudo-wire；
Will be poly- as choosing pseudo-wire to add dynamic with the pseudo-wire that the dynamic aggregation attribute information matches in the pseudo-wire to be configured
Close pseudo-wire group；
With end edges router consult, by local terminal edge router dynamic aggregation pseudo-wire group with end edges router dynamic
Choose pseudo-wire to add respective dynamic aggregation pseudo-wire group as pseudo-wire member common in polymerization pseudo-wire group, and the pseudo-wire is set
The working condition of member.
5. pseudo-wire load sharing retransmission method as claimed in claim 4, it is characterised in that set dynamic aggregation pseudo-wire group also to include：
When detecting port change and/or the abnormal state of a certain pseudo-wire member of the dynamic aggregation pseudo-wire group, by the pseudo-wire
Member removes from the dynamic aggregation pseudo-wire group, and notifies dynamic of the end edges router by the pseudo-wire member from opposite end
Removed in polymerization pseudo-wire group.
6. pseudo-wire load sharing retransmission method as claimed in claim 4, it is characterised in that the dynamic aggregation attribute information includes：
Polymerization pseudo-wire group mark, the purpose edge router address of pseudo-wire, pseudo- ray mode belonging to pseudo-wire are dynamic mode, pseudo-wire class
Type, pseudo-wire bandwidth and pseudo-wire control word.
7. the pseudo-wire load sharing retransmission method as described in claim any one of 2-6, it is characterised in that described to set pseudo-wire member's
Working condition includes：
Under active and standby forward mode：If the pseudo-wire member currently added is main pseudo-wire and its state is UP, the puppet is set
The working condition of line member is state of activation；If the pseudo-wire member currently added is standby pseudo-wire and its state is UP, if
Pseudo-wire member is put to prepare state of activation；If the pseudo-wire member condition currently added is abnormal, set the pseudo-wire into
The working condition of member is unactivated state；
Under load sharing pattern：If the pseudo-wire member condition currently added is UP, the work of pseudo-wire member is set
State is state of activation；If the pseudo-wire member condition currently added is abnormal, the working condition of pseudo-wire member is set
For unactivated state.
8. pseudo-wire load sharing retransmission method as claimed in claim 7, it is characterised in that according to the service message in polymerization pseudo-wire
One is selected in each pseudo-wire member in group includes as target pseudo-wire：
Under active and standby forward mode, the main pseudo-wire in selective polymerization pseudo-wire group is as target pseudo-wire；
Under load sharing pattern, user's VLAN or physical address in the service message are from polymerization pseudo-wire group
In each working condition for activation pseudo-wire member in selection one be used as target pseudo-wire.
9. a kind of edge router, including：
Message receiving module, for receiving the service message from user equipment；
Pseudo-wire selecting module, for selecting a conduct in each pseudo-wire member polymerizeing in pseudo-wire group according to the service message
Target pseudo-wire；It is described polymerization pseudo-wire group be：What local terminal edge router and end edges router were pre-set belongs to same void
Intend the pseudo-wire set of private network (VPN) examples, the source edge router and purpose of the transmission path of each pseudo-wire member in the pseudo-wire set
Edge router is respectively local terminal edge router and end edges router, and local terminal edge router is the service message
Entrance, end edges router be the service message outlet；
Packet forwarding module, for the service message to be forwarded into the end edges router by the target pseudo-wire.
10. edge router as claimed in claim 9, it is characterised in that the polymerization pseudo-wire group includes static polymerization pseudo-wire
Group；
The edge router also includes static polymerization pseudo-wire group configuration module, for receiving static pseudo-wire configuration information, and obtains
Static polymerization attribute information is taken, pseudo-wire to be configured is included in the static pseudo-wire configuration information；And for will be described to be configured
Static polymerization pseudo-wire group is added as pseudo-wire member with the pseudo-wire that the static polymerization attribute information matches in pseudo-wire, and sets and is somebody's turn to do
The working condition of pseudo-wire member.
11. edge router as claimed in claim 9, it is characterised in that the polymerization pseudo-wire group includes dynamic aggregation pseudo-wire
Group；
The edge router also includes dynamic aggregation pseudo-wire group configuration module, for receiving dynamic pseudo-wire configuration information, and obtains
Dynamic aggregation attribute information is taken, pseudo-wire to be configured is included in the dynamic pseudo-wire configuration information；And for will be described to be configured
The pseudo-wire matched in pseudo-wire with the dynamic aggregation attribute information, which is used as, chooses pseudo-wire to add dynamic aggregation pseudo-wire group, and and opposite end
Edge router consult, by local terminal edge router dynamic aggregation pseudo-wire group with end edges router dynamic aggregation pseudo-wire group
In common to choose pseudo-wire as the respective dynamic aggregation pseudo-wire group of pseudo-wire member addition, and the work of pseudo-wire member is set
State.
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