CN106656554A - Method and device for implementing LACP in MLAG environment - Google Patents
Method and device for implementing LACP in MLAG environment Download PDFInfo
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- CN106656554A CN106656554A CN201610896186.2A CN201610896186A CN106656554A CN 106656554 A CN106656554 A CN 106656554A CN 201610896186 A CN201610896186 A CN 201610896186A CN 106656554 A CN106656554 A CN 106656554A
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- mlag
- lacp
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- equipment
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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
- H04L45/24—Multipath
- H04L45/245—Link aggregation, e.g. trunking
-
- 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
- H04L41/08—Configuration management of networks or network elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/82—Miscellaneous aspects
- H04L47/827—Aggregation of resource allocation or reservation requests
Abstract
The invention discloses a method and device for implementing an LACP in an MLAG environment. The method comprises the following steps of LACP system priority synchronization between devices that support MLAG, to ensure that values of the local system priority in an LACPDU sent by the two devices supporting the MLAG are the same; performing LACP system ID synchronization between the devices that support MLAG, to ensure that the values of local system IDs in the LACPDU sent by the two devices supporting the MLAG are the same; when an MLAC-enabled device port sends an LACPDU, using MLAG IDs on the port to replace the port aggregation group ID to write into a local operation Key, and a special mark which can be set to prevent mis-matching is disposed in the local operation Key. Through further expansion of a traditional LACP, the invention can support the cross-device aggregation function in the MLAG environment without the need of other protocols.
Description
Technical field
The present invention relates to a kind of network communication technology field, more particularly, to a kind of side that LACP is realized under MLAG environment
Method.
Background technology
Spanning-Tree Protocol (STP, Spanning Tree Protocol) is to be operated in two layers in OSI Reference Model of association
View.In double layer network, switch serves very important effect, in network, if switch breaks down, can affect
The use of network, in order to avoid there is Single Point of Faliure, adopts link redundancy on two layers of actual link, that is, using exchange
Multilink connection, i.e., have connection between multiple stage switch between equipment, accordingly even when a switch breaks down, also may be used
With using other switches, so as to guarantee a network connections.
Although aforesaid way can keep network unimpeded, some problems can be produced.Due between respective switch equipment
There is link connection, datagram reaches the route of destination host and increases, so that datagram is constantly turned among the switches
Send out, ultimately form a loop.The problems such as loop is easily caused broadcast storm, frame repeat replication, mac address table is unstable, most
Cause periods of network disruption eventually.
Spanning-Tree Protocol (STP, Spanning Tree Protocol) can make load balancing and redundancy in two layers of realization.
Due to the presence of STP, load balancing can not be realized between different devices, because SPT meeting port blockeds, so as to prevent network
There is loop, but the problem brought is to cause the decline of bandwidth.By striding equipment link aggregation (MLAG, multi-chassis
Link aggregation) this problem can be solved.MLAG links are arranged between two aggregation switch to be attached, and are made
, logically such as same equipment, the port of two equipment is collectively forming aggregation port so that all of the port can be participated in jointly for it
The forwarding of data traffic.
General on equipment all to use aggregation port, the aggregation port on equipment to have two kinds of forms, one kind is static polymerization,
One kind is dynamic aggregation.Static polymerization is as its name suggests static configuration, and by keeper is static polymerization member is specified, and there is no association
View interaction.It, based on the LACP of IEEE802.3ad standards, is by LACPDU (Link Aggression that dynamic aggregation is
Control Protocol Data Unit) carrying out information exchange.Traditional static polymerization supports that MLAG has no problem, but
During using dynamic LACP, can there is a problem of that port can not bind under MLAG scenes.Legacy equipment is bound when using LACP
Port in same aggregation group is all present on same equipment, but in MLAG scenes, realizes cross-equipment aggregation.Polymerization
Port can cannot ensure Actor Key always, ultimately result in not from different equipment, the LACPDU from different equipment
Can be bundled within same aggregation group.
The content of the invention
It is an object of the invention to overcome the defect of prior art, there is provided a kind of side that LACP is realized under MLAG environment
Method, realizes connection using static state LACP or dynamic LACP among the switches, it is not necessary to by other agreements, so as to solve to pass
The problem of the LACP of system cisco unity malfunctions under MLAG scenes.
For achieving the above object, the present invention proposes following technical scheme：A kind of method that LACP is realized under MLAG environment,
Methods described comprises the steps：
S101, between the equipment for supporting MLAG LACP system priority synchronizations are carried out, to ensure that two are supported MLAG's
The value of the local terminal system priority in the LACPDU that equipment sends is identical；
S202, between the equipment for supporting MLAG LACP system identifier synchronizations are carried out, the equipment to ensure two support MLAG
Local terminal system identifier value in the LACPDU for sending is identical；
S303, when the device port for enabling MLAG sends LACPDU, replaces port and gathers using the MLAG ID on port
Charge-coupled ID is inserted in local terminal Operational Key, and is provided with preventing the special marking of error hiding in local terminal Operational Key.
Preferably, the LACP system priorities are configured to value that is identical or differing.
Preferably, it is described to support to be carried out in LACP system identifier synchronizations between MLAG equipment, LACP system identifiers are inserted into this
In end system ID.
Preferably, the special marking is that the value of local terminal Operational Key highest order is set into 1.
Preferably, the value of the local terminal Operational Key is 0x8001, and high byte 0x80 identifies MLAG to distinguish traditional LACP,
The value of low byte 0x01 mark MLAG ID is 1.
A kind of device that LACP is realized under MLAG environment, including LACP system priority synchronization modules, LACP system identifiers
Synchronization module, and local terminal Operational Key synchronization module, wherein,
LACP system priorities synchronization module carries out LACP system priority synchronizations between support MLAG equipment,
LACP system identifiers synchronization module carries out LACP system identifier synchronizations between support MLAG equipment, and
Local terminal Operational Key synchronization module replaces port trunking group ID using the MLAG ID on port, and inserts local terminal operation
In Key, and it is provided with preventing the special marking of error hiding in local terminal Operational Key.
Preferably, LACP system priorities are configured to identical or differ in the LACP system priorities synchronization module
Value.
Preferably, LACP system identifiers are inserted in local terminal system identifier in the LACP system identifiers synchronization module.
Preferably, System ID are inserted in Actor System in the LACP System ID synchronization modules.
Preferably, special marking is that the value of local terminal Operational Key highest order is set into 1.
Preferably, the value of the local terminal Operational Key is 0x8001, and high byte 0x80 identifies MLAG to distinguish traditional LACP,
The value of low byte 0x01 mark MLAG ID is 1.
The invention has the beneficial effects as follows：
The method and device that LACP is realized under MLAG environment of the present invention, further expands traditional LACP agreements
Exhibition, replaces port trunking group ID so that cross-equipment aggregation can be realized under MLAG environment, and is not required to by using MLAG ID
Will be by other agreements, it is easy to accomplish.
Description of the drawings
Fig. 1 is that embodiments of the invention topological diagram is intended to；
Fig. 2 is the LACP message structure schematic diagrames of the present invention；
Fig. 3 is the method flow diagram schematic diagram that LACP is realized under MLAG environment of the present invention；
Fig. 4 is the LACP message details schematic diagrames of the present invention；
Fig. 5 is the device block diagram schematic diagram that LACP is realized under MLAG environment of the present invention.
Reference：
1st, LACP system priorities synchronization module, 2, LACP system identifier synchronization modules, 3, local terminal Operational Key synchronization module.
Specific embodiment
Below in conjunction with the accompanying drawing of the present invention, clear, complete description is carried out to the technical scheme of the embodiment of the present invention.
LACP (Link Aggression Control Protocol, the link aggregation control association of IEEE802.3ad standards
View) it is an agreement with regard to dynamic link aggregation, it passes through protocol massages LACPDU (Link Aggression Control
Protocol Data Unit, Link Aggregation Control Protocol Data Unit) with the equipment interactive information being connected.
After interface enabling LACP agreements, the system priority (LACP of oneself is noticed in port by sending LACPDU
System Priority), equipment MAC, the priority of port, port numbers and Operational Key (Actor Key) etc..Associated devices are received
To after the message, according to the information of other ports for being stored, selection port carries out corresponding converging operation, double such that it is able to make
Side exits or adds and reach in aggregation group unanimously in port.
Member in aggregation group may have three state,
(1) when the Link State of port is in Down, port does not forward any data message, is shown as " down " shape
State.
(2) when the Link State of port is in UP, and after LACP consults, port is placed in polymerization state (port
Forwarded by the data message that a member as an aggregation group participates in aggregation group), it is shown as " bndl " state；
(3) when the Link State of port is in UP, but because opposite end does not enable LACP, or because port attribute
Some factors of grade inconsistent with master port cause (not joined the port in suspended state as suspended state through negotiated ports
With data message forwarding), it is shown as " sups " state.
Every equipment only exists a LACP paradigmatic system.Each LACP paradigmatic system has unique system priority
(LACP System Priority).It is preferential generally according to the system identifier of LACP when this end system is held consultation with peer-to-peer system
Level determining the forwarding state of port, the higher decision port status of the system identifier priority of LACP, wherein, the system identifier of LACP
(LACP System ID) is made up of the system priority and device mac address of LACP, during negotiation, the system that LACP is compared first
Priority, the system priority of LACP is less, then the priority of the system identifier of LACP is higher, if in the system priority phase of LACP
With in the case of, then further compare device mac address, device mac address is less, then the priority of the system identifier of LACP is got over
It is high.
With reference to shown in Fig. 1, Fig. 2 and Fig. 3, a kind of disclosed method that LACP is realized under MLAG environment, this
In embodiment, by taking three switches as an example, technical solutions according to the invention are described in detail.
Wherein switch 1 and switch 2 are to support the equipment of the equipment, switch 3 of MLAG not support MLAG, but support
LACP.As shown in Fig. 2 the details of LACP messages, wherein local terminal system priority (Actor System Priority),
Local terminal system identifier (Actor System) and local terminal Operational Key (Actor Key) are to be filled in message according to local/this client information
In.Opposite equip. is received after protocol massages, above-mentioned three can participation agreement computing.Only this three information are identical
Member, can just be bound into dynamic aggregation mouth.In traditional LACP, because a side ports are all on same equipment
, therefore local terminal system priority and local terminal system identifier can be consistent, local terminal Operational Key can be matched somebody with somebody by keeper
Put.Such as system is using port trunking group ID (Channel-group ID) on interface (Interface) as local terminal Operational Key
During (Actor Key) inserts LACP messages, keeper can ensure Actor by configuring identical Channel-group ID
Key's is consistent, thus the multiple ports on an equipment just can successfully be bound in same aggregation group and go.
As shown in figure 1, but for MLAG environment under, on switch 3 in Channel-group 3 two ports difference
From two different equipment, i.e., respectively from switch 1 and switch 2, the Channel-group on two distinct devices
ID is also very possible inconsistent, and Channel-group 1 and Channel-group 2 is respectively in figure.So they divide
Local terminal system priority (Actor System Priority) in the LACPDU not sent, local terminal system identifier (Actor
System) and local terminal Operational Key (Actor Key) may all be different, therefore, just cannot be bound on switch 3
To among same aggregation group.
Realize the normal function of the LACP under MLAG environment, it is necessary to ensure the completely the same of three contents above.It is logical
Cross three steps to be realized, as shown in Figure 3；
The method that LACP is realized under MLAG environment, comprises the steps：
S101, carries out LACP system priorities (LACP System Priority) synchronously between support MLAG equipment,
Local terminal system priority (Actor System Priority) value phase in ensure the LACPDU that two MLAG equipment send
Together；
S202, is supporting to be carried out between MLAG equipment LACP system identifiers (LACP System ID) synchronously, to ensure two
Local terminal system identifier (Actor System) value in the LACPDU that MLAG equipment sends is identical；
S303, when the device port for enabling MLAG sends LACPDU, replaces port and gathers using the MLAG ID on port
Charge-coupled ID (Channel-group ID), and insert in local terminal Operational Key (Actor Key), and in local terminal Operational Key (Actor
Key it is provided with preventing the special marking of error hiding in).
Further, in the synchronization for carrying out LACP system priorities between MLAG equipment is supported, due to LACP systems
Priority can be respectively configured on two equipment, and priority can be made into different values by two equipment, it is also possible to be configured to
Identical value.Concrete configuration order is as follows：Router(config)#lacp system-priority system-
priority.Due to supporting that MLAG equipment has dividing for master-slave equipment, from equipment the priority that main equipment is sent is able to record that.When making
When can send LACPDU on the device port of MLAG, system priority is inserted into local terminal system priority, to ensure that principal and subordinate sets
Local terminal system priority in standby LACPDU is consistent.
Further, in the synchronization for carrying out LACP system identifiers between MLAG equipment is supported, from equipment main equipment is recorded
LACP system identifiers.When the device port for enabling MLAG sends LACPDU, LACP system identifiers are inserted into local terminal system identifier
In, it is ensured that the local terminal system identifier on master-slave equipment in Link Aggregation Control Protocol Data Unit is consistent.
Further, because two apparatus bounds are into the aggregation group of MLAG mouths, port trunking group ID can with difference, therefore
Port trunking group ID is replaced using MLAG ID, ensure that local terminal Operational Key is consistent, local terminal Operational Key is that keeper can be with
The configuration of guarantee.Therefore need to extend traditional LACP agreements to realize port trunking, port is replaced by using MLAG ID
Aggregation group ID is inserted among local terminal Operational Key.
In order to the LACPDU sent with the device port for not enabling MLAG is distinguished, by by local terminal Operational Key
Carry out special marking and avoid error hiding, in the present embodiment, the highest order (Bit) of local terminal Operational Key is set into 1, naturally it is also possible to
Can be marked from other modes, such as a secondary high position is set into 1, in order to effectively can carry out area with local LACP
Separate.As the port on switch 1 enables MLAG, and MLAG ID are configured to 1, and the port on switch 2 does not enable
MLAG, simply adds port trunking 1 port, if the at this time difference without highest bit, then both local terminal operations
Key will be 0x1, do on switch 3 polymerization process when, two scripts should not can be bundled in the end of an aggregation group
Mouth carries out binding by mistake.In sum, the local terminal Operational Key of the LACPDU that switch 2 sends be 0x1, the local terminal that switch 1 sends
Operational Key is 0x8001, because Actor Key fields are 16 (Bit), i.e., two bytes (Byte)) and, due to both Actor
Key is different, so as to avoid being bundled in same aggregation group by mistake.In addition, do not consider situation of aggregation group ID more than 32768, i.e.,
More than 0x8000, so many aggregation groups will not be supported in usual system.
As shown in figure 4, packet capturing can be seen that Actor Key and have been modified into 0x8001 from network system.High word
The 0x80 of section be mark MLAG to distinguish traditional LACP, the 0x01 of low byte is that to represent MLAG ID be 1.Through such place
After reason, this end system in the LACPDU respectively from switch 1 and two equipment of switch 2 that switch 3 is received is excellent
Three contents of first level, local terminal system identifier and local terminal Operational Key are consistent, therefore the two ports just can be with switch 3
Among being successfully bound to same aggregation group.Importantly, the present invention only needs to be carried out apply is supporting setting for MLAG
On standby on switch 1 and switch 2 as depicted, and the general switch equipment for not supporting MLAG need not be embodied in
On, switch 3 as illustrated in the drawing.For the conventional equipment for not supporting MLAG, only support that traditional LACP agreements just can be real
Existing port trunking.
Further, as shown in figure 5, a kind of device that LACP is realized under MLAG environment, including LACP System Priorities
Level synchronization module, LACP system identifier synchronization modules, and local terminal Operational Key synchronization module, wherein,
LACP system priorities synchronization module carries out LACP system priority synchronizations between support MLAG equipment,
LACP system identifiers synchronization module carries out LACP system identifier synchronizations between support MLAG equipment, and
Local terminal Operational Key synchronization module replaces port trunking group ID using the MLAG ID on port, and inserts local terminal operation
In Key, and it is provided with preventing the special marking of error hiding in local terminal Operational Key (Actor Key).
Specifically, Router (config) the #lacp system- used in LACP system priority synchronization modules
The priority of two equipment is made into different values by priority system-priority, it is also possible to be configured to identical value,
When LACPDU is sent on the device port for enabling MLAG, priority is inserted into local terminal system priority, to ensure that principal and subordinate sets
Local terminal system priority in standby LACPDU is consistent.
In LACP system identifier synchronization modules, LACP system identifiers are inserted in local terminal system identifier, it is ensured that on master-slave equipment
Local terminal system identifier in Link Aggregation Control Protocol Data Unit is consistent.
In local terminal Operational Key synchronization module, port trunking group ID is replaced using the MLAG ID on port, and insert this
In the Operational Key of end, and local terminal Operational Key is carried out into special marking, it is to avoid error hiding, in the present embodiment, by local terminal Operational Key
Highest order (Bit) is set to 1, naturally it is also possible to be marked from other modes, such as a secondary high position is set into 1, in order to energy
Enough effectively to make a distinction out with local LACP, specifically, the value of the local terminal Operational Key is 0x8001, and high byte 0x80 is marked
MLAG is known to distinguish traditional LACP, the value of low byte 0x01 mark MLAG ID is 1.
The method and device of LACP is realized under MLAG environment of the present invention, by further to traditional LACP agreements
Extension, it would be preferable to support it realizes the polymerizable functional of striding equipment under MLAG environment, and need not be by other agreements.
The technology contents and technical characteristic of the present invention have revealed that as above, but those of ordinary skill in the art still may base
Make a variety of replacements and modification without departing substantially from spirit of the present invention in teachings of the present invention and announcement, therefore, the scope of the present invention
The content that should be not limited to disclosed in embodiment, and various replacements and modification without departing substantially from the present invention should be included, and for this patent Shen
Please claim covered.
Claims (10)
1. a kind of method that LACP is realized under MLAG environment, it is characterised in that methods described comprises the steps：
S101, between the equipment for supporting MLAG LACP system priority synchronizations are carried out, the equipment to ensure two support MLAG
The value of the local terminal system priority in the LACPDU for sending is identical；
S202, between the equipment for supporting MLAG LACP system identifier synchronizations are carried out, to ensure that the equipment of two support MLAG sends
LACPDU in local terminal system identifier value it is identical；
S303, when the device port for enabling MLAG sends LACPDU, using the MLAG ID on port port trunking group is replaced
ID is inserted in local terminal Operational Key, and is provided with preventing the special marking of error hiding in local terminal Operational Key.
2. method according to claim 1, it is characterised in that the LACP system priorities are configured to identical or differ
Value.
3. method according to claim 1, it is characterised in that described to support to carry out LACP system identifiers between MLAG equipment
In synchronization, LACP system identifiers are inserted in local terminal system identifier.
4. method according to claim 1, it is characterised in that the special marking is by local terminal Operational Key highest order
Value is set to 1.
5. method according to claim 4, it is characterised in that the value of the local terminal Operational Key is 0x8001, high byte
0x80 identifies MLAG to distinguish traditional LACP, and the value of low byte 0x01 mark MLAG ID is 1.
6. a kind of device that LACP is realized under MLAG environment, it is characterised in that including LACP system priority synchronization modules,
LACP system identifier synchronization modules, and local terminal Operational Key synchronization module, wherein,
LACP system priorities synchronization module carries out LACP system priority synchronizations between support MLAG equipment,
LACP system identifiers synchronization module carries out LACP system identifier synchronizations between support MLAG equipment, and
Local terminal Operational Key synchronization module replaces port trunking group ID using the MLAG ID on port, and inserts local terminal Operational Key
In, and be provided with preventing the special marking of error hiding in local terminal Operational Key.
7. device according to claim 6, it is characterised in that LACP systems in the LACP system priorities synchronization module
Priority is configured to value that is identical or differing.
8. device according to claim 6, it is characterised in that by LACP system identifiers in the LACP system identifiers synchronization module
In inserting local terminal system identifier.
9. device according to claim 6, it is characterised in that the special marking is by local terminal Operational Key highest order
Value is set to 1.
10. device according to claim 9, it is characterised in that the value of the local terminal Operational Key is 0x8001, high byte
0x80 identifies MLAG to distinguish traditional LACP, and the value of low byte 0x01 mark MLAG ID is 1.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108989213A (en) * | 2017-05-31 | 2018-12-11 | 瞻博网络公司 | It is arranged using the selected structural path transmission LSP between dummy node |
| CN109547368A (en) * | 2018-11-19 | 2019-03-29 | 锐捷网络股份有限公司 | Stacking adaptation method and device are removed based on data center |
| CN112688867A (en) * | 2020-12-22 | 2021-04-20 | 浪潮思科网络科技有限公司 | Method, device, equipment and medium for operating spanning tree protocol in MLAG environment |
| CN114363228A (en) * | 2021-12-31 | 2022-04-15 | 迈普通信技术股份有限公司 | MLAG-Lite test system and method |
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| CN105308912A (en) * | 2013-04-23 | 2016-02-03 | 瑞典爱立信有限公司 | A method and system for synchronizing with a neighbor in a distributed resilient network interconnect (DRNI) link aggregation group |
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| CN103107956A (en) * | 2012-11-30 | 2013-05-15 | 大唐移动通信设备有限公司 | Parameter updating method, link aggregation method and communication terminal |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108989213A (en) * | 2017-05-31 | 2018-12-11 | 瞻博网络公司 | It is arranged using the selected structural path transmission LSP between dummy node |
| CN109547368A (en) * | 2018-11-19 | 2019-03-29 | 锐捷网络股份有限公司 | Stacking adaptation method and device are removed based on data center |
| CN112688867A (en) * | 2020-12-22 | 2021-04-20 | 浪潮思科网络科技有限公司 | Method, device, equipment and medium for operating spanning tree protocol in MLAG environment |
| CN112688867B (en) * | 2020-12-22 | 2022-07-12 | 浪潮思科网络科技有限公司 | Method, device, equipment and medium for operating spanning tree protocol in MLAG environment |
| CN114363228A (en) * | 2021-12-31 | 2022-04-15 | 迈普通信技术股份有限公司 | MLAG-Lite test system and method |
| CN114363228B (en) * | 2021-12-31 | 2023-10-27 | 迈普通信技术股份有限公司 | MLAG-Lite test system and method |
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