CN116248584A - Method, equipment and medium for processing EVPN route under double SPINE MLAG environment - Google Patents

Method, equipment and medium for processing EVPN route under double SPINE MLAG environment Download PDF

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Publication number
CN116248584A
CN116248584A CN202310031537.3A CN202310031537A CN116248584A CN 116248584 A CN116248584 A CN 116248584A CN 202310031537 A CN202310031537 A CN 202310031537A CN 116248584 A CN116248584 A CN 116248584A
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equipment
vxlan tunnel
tunnel endpoint
link aggregation
cross
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CN202310031537.3A
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CN116248584B (en
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张婵
向荣
陈志平
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Inspur Cisco Networking Technology Co Ltd
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Inspur Cisco Networking Technology Co Ltd
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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
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
    • 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
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The application discloses a method, equipment and medium for processing EVPN routing under a double SPINE MLAG environment, which are used for solving the problem that in the prior art, when a link or a SPINE equipment fails, a VXLAN tunnel of a VTEP equipment is down, so that traffic on the VTEP equipment is lost due to Hash. The method comprises the following steps: determining a first cross-device link aggregation group, a second cross-device link aggregation group and corresponding virtual addresses, and establishing BGP neighbor relations with two SPINE devices to enable the two SPINE devices to learn the next hop address of the first cross-device link aggregation group and obtain corresponding EVPN routes; the two SPINE devices forward the EVPN route to the second cross-device link aggregation group so that the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device receive and store the EVPN route; and when the link fails or the equipment fails, determining the EVPN route learned based on the non-failure link between the corresponding VXLAN tunnel endpoint equipment and another SPINE equipment, and realizing traffic forwarding on the VXLAN tunnel endpoint equipment to ensure that the VXLAN tunnel of the VXLAN tunnel endpoint equipment keeps in an operation state.

Description

Method, equipment and medium for processing EVPN route under double SPINE MLAG environment
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a method, an apparatus, and a medium for processing EVPN routing in a dual SPINE MLAG environment.
Background
The scalable virtual local area network (Virtual Extensible Local Area Network, VXLAN) is a two-layer virtual private network (Virtual Private Network, VPN) technology based on an internet protocol (Internet Protocol, IP) network in the form of a "medium access control (Media Access Control, MAC) in user datagram protocol (User Datagram Protocol, UDP)" encapsulation. The Ethernet virtual private network (Ethernet Virtual Private Network, EVPN) is a VPN technology for realizing network two-layer intercommunication, adopts a border gateway protocol (Border Gateway Protocol, BGP) to announce route information on a control plane, and adopts a VXLAN encapsulation mode to forward user messages on a data plane. The cross-device link aggregation group (Multi-Chassis Link Aggregation Group, MLAG) scenario also supports EVPN technology, with two VXLAN tunnel endpoint (VXLAN Tunneling End Point, VTEP) devices building a distributed aggregation system with HOST 1.
In the existing dual SPINE leaf structure, if the VTEP1 device and the VTEP2 device adopt the same VNI configuration, the attributes of the EVPN routes (type 2, type3, and type 5) transmitted to the SPINE1 device and the SPINE2 device by the VTEP1 device and the VTEP2 device are identical. When the VTEP3 device and the VTEP4 device receive the route forwarded by the SPINE device and process the route, the received route attributes are compared, but, because the received route attributes are identical, the VTEP3 device and the VTEP4 device discard the route forwarded by the SPINE device received later directly. Although it is the route forwarded by the different SPINE devices, only one SPINE device forwarded route can be stored on VTEP3 and VTEP 4. In this way, in the case that the link between the VTEP device and one of the spin devices fails, or one of the spin devices fails, and the route on the VTEP is learned from this spin device, the Overlay route of the VTEP and this spin is withdrawn, and the VXLAN tunnel down, thereby causing the problem of traffic packet loss on Hash to the VTEP.
Disclosure of Invention
The embodiment of the application provides a method, equipment and medium for processing EVPN routing in a dual SPINE MLAG environment, which are used for solving the technical problem that in the existing dual-SPINE SPINE leaf structure, under the condition that a link between VTEP equipment and one of the SPINE equipment fails or one of the SPINE equipment fails and the routing on the VTEP equipment is learned from the SPINE equipment, the Overlay routing between the VTEP equipment and the SPINE equipment is cancelled, and a VXLAN tunnel is down, so that the traffic packet on the VTEP equipment is lost by Hash.
In one aspect, embodiments of the present application provide a method for processing EVPN routing in a dual SPINE MLAG environment, including:
establishing an Underlay route between each VXLAN tunnel endpoint device and two SPINE devices respectively, determining a first cross-device link aggregation group and a second cross-device link aggregation group, and determining virtual addresses corresponding to the first cross-device link aggregation group and the second cross-device link aggregation group;
establishing BGP neighbor relations between the first cross-device link aggregation group and the second cross-device link aggregation group and the two SPINE devices according to the corresponding virtual addresses, so that the two SPINE devices learn the next hop address of the first cross-device link aggregation group and obtain corresponding EVPN routes;
Forwarding, by the two pieces of pline equipment, the EVPN route corresponding to the first span equipment link aggregation group to the second span equipment link aggregation group, so that a third VXLAN tunnel endpoint equipment and a fourth VXLAN tunnel endpoint equipment in the second span equipment link aggregation group receive and store the EVPN route corresponding to the first span equipment link aggregation group;
and under the condition of link failure or equipment failure, determining the EVPN route learned based on a non-failure link between the corresponding VXLAN tunnel endpoint equipment and another SPINE equipment, and realizing traffic forwarding on the VXLAN tunnel endpoint equipment.
In one implementation manner of the present application, in the case of a link failure or a device failure, determining an EVPN route learned based on a non-failed link between a corresponding VXLAN tunnel endpoint device and another pline device, to implement traffic forwarding on the VXLAN tunnel endpoint device specifically includes:
in the case that a link between any VXLAN tunnel endpoint device in the second inter-device link aggregation group and any spin device in the two spin devices fails, or any spin device in the two spin devices fails, the Overlay route between the VXLAN tunnel endpoint device and the corresponding spin device is withdrawn;
Determining an EVPN route learned from the other SPINE device based on a non-fault link between the VXLAN tunnel endpoint device and the other SPINE device in the two SPINE devices in the VXLAN tunnel endpoint device;
and based on the EVPN route, the VXLAN tunnel endpoint equipment in the second cross-equipment link aggregation group and the VXLAN tunnel between the first cross-equipment link aggregation group are in an operation state, so that traffic forwarding on the VXLAN tunnel endpoint equipment is realized.
In one implementation manner of the present application, the determining a first cross-device link aggregation group and a second cross-device link aggregation group specifically includes:
determining a first cross-device link aggregation group consisting of a first VXLAN tunnel endpoint device and a second VXLAN tunnel endpoint device, and taking the first cross-device link aggregation group as a gateway of the first VXLAN tunnel endpoint device and the second VXLAN tunnel endpoint device;
and determining a second cross-device link aggregation group consisting of the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device, and taking the second cross-device link aggregation group as a gateway of the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device.
In one implementation manner of the present application, the determining virtual addresses corresponding to the first cross-device link aggregation group and the second cross-device link aggregation group specifically includes:
configuring the same virtual address for a first VXLAN tunnel endpoint device and a second VXLAN tunnel endpoint device in the first cross-device link aggregation group to obtain a virtual address corresponding to the first cross-device link aggregation group;
and configuring the same virtual address for the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device in the second cross-device link aggregation group to obtain the virtual address corresponding to the second cross-device link aggregation group.
In one implementation manner of the present application, after establishing BGP neighbor relations between the first and second inter-device link aggregation groups and the two pline devices according to the corresponding virtual addresses, the method further includes:
based on the virtual address corresponding to the first inter-equipment link aggregation group, an EVPN route corresponding to the first VXLAN tunnel endpoint equipment and the second VXLAN tunnel endpoint equipment in the first inter-equipment link aggregation group is sent to a first SPINE equipment and a second SPINE equipment in the two SPINE equipment;
And based on the corresponding EVPN route, the first SPINE equipment and the second SPINE equipment learn the next hop address corresponding to the first VXLAN tunnel endpoint equipment and the second VXLAN tunnel endpoint equipment in the first cross-equipment link aggregation group so as to obtain the corresponding EVPN route.
In one implementation manner of the present application, the forwarding, by the two pline devices, the EVPN route corresponding to the first cross-device link aggregation group to the second cross-device link aggregation group, so that the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device in the second cross-device link aggregation group receive and store the EVPN route corresponding to the first cross-device link aggregation group, specifically includes:
based on the virtual address corresponding to the second cross-equipment link aggregation group, the corresponding EVPN route learned by the first SPINE equipment in the two SPINE equipment is respectively sent to a third VXLAN tunnel endpoint equipment and a fourth VXLAN tunnel endpoint equipment in the second cross-equipment link aggregation group;
based on the virtual address corresponding to the second cross-equipment link aggregation group, the corresponding EVPN route learned by the second SPINE equipment in the two SPINE equipment is respectively sent to a third VXLAN tunnel endpoint equipment and a fourth VXLAN tunnel endpoint equipment in the second cross-equipment link aggregation group;
And receiving the EVPN route sent by the first SPINE equipment and the EVPN route sent by the second SPINE equipment through the third VXLAN tunnel endpoint equipment and the fourth VXLAN tunnel endpoint equipment, and storing the EVPN route sent by the first SPINE equipment and the EVPN route sent by the second SPINE equipment into the third VXLAN tunnel endpoint equipment and the fourth VXLAN tunnel endpoint equipment.
In one implementation manner of the present application, after the determining the virtual addresses corresponding to the first cross-device link aggregation group and the second cross-device link aggregation group, the method further includes:
based on the virtual address corresponding to the first cross-device link aggregation group and the virtual address corresponding to the second cross-device link aggregation group, a VXLAN tunnel is established between a first VXLAN tunnel endpoint device and a second VXLAN tunnel endpoint device in the first cross-device link aggregation group and between a third VXLAN tunnel endpoint device and a fourth VXLAN tunnel endpoint device in the second cross-device link aggregation group;
and forwarding traffic among the first VXLAN tunnel endpoint device, the second VXLAN tunnel endpoint device, the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device through the VXLAN tunnel.
In one implementation of the present application, before the determining the first cross-device link aggregation group and the second cross-device link aggregation group, the method further includes:
and determining that two VXLAN tunnel endpoint devices corresponding to the first cross-device link aggregation group are not overlapped with two VXLAN tunnel endpoint devices corresponding to the second cross-device link aggregation group.
In another aspect, an embodiment of the present application further provides an apparatus for processing EVPN routing in a dual SPINE MLAG environment, the apparatus including:
at least one processor;
and a memory communicatively coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a method of handling EVPN routing in a dual SPINE MLAG environment as described above.
In another aspect, embodiments of the present application also provide a non-volatile computer storage medium storing computer-executable instructions configured to:
a method of handling EVPN routing in a dual SPINE MLAG environment as described above.
The embodiment of the application provides a method, equipment and medium for processing EVPN routing in a double SPINE MLAG environment, which at least comprise the following beneficial effects:
After establishing the Underlay route between the VTEP equipment and the SPINE equipment, establishing BGP neighbor relation between the first and second cross equipment link aggregation groups and the two SPINE equipment according to virtual addresses by determining the first and second cross equipment link aggregation groups and corresponding virtual opposition, so that the two SPINE equipment learns the next hop address of the first cross equipment link aggregation group and obtains a corresponding EVPN route, and then the two SPINE equipment forwards the corresponding EVPN route to the second cross equipment link aggregation group, thereby enabling a third VXLAN tunnel endpoint equipment and a fourth VXLAN tunnel endpoint equipment in the second cross equipment link aggregation group to receive and store the EVPN route corresponding to the first cross equipment link aggregation group; under the condition of link failure or equipment failure, the EVPN route learned based on the non-failure link between the VXLAN tunnel endpoint equipment and another SPINE equipment can be determined, so that the VXLAN tunnel between the VXLAN tunnel endpoint equipment keeps an operation state, thereby ensuring the flow forwarding on the VXLAN tunnel endpoint equipment, and avoiding the technical problem of packet loss caused by the failure of the VXLAN tunnel due to the flow from Hash to the VTEP equipment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
fig. 1 is a flow chart of a method for processing EVPN routing in a dual SPINE MLAG environment according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another method for processing EVPN routing in a dual SPINE MLAG environment according to an embodiment of the present application;
fig. 3 is a schematic internal structure of an apparatus for processing EVPN routing in a dual SPINE MLAG environment according to an embodiment of the present application.
Detailed Description
For the purposes, technical solutions and advantages of the present application, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
After establishing an Underlay route between VXLAN tunnel endpoint VTEP equipment and SPINE equipment, establishing BGP neighbor relation between the first cross equipment link aggregation group and the second cross equipment link aggregation group and the two SPINE equipment according to virtual addresses by determining the first cross equipment link aggregation group and the second cross equipment link aggregation group and corresponding virtual opposition, so that the two SPINE equipment learn the next hop address of the first cross equipment link aggregation group and acquire a corresponding EVPN route once, and then the two SPINE equipment forwards the corresponding EVPN route to the second cross equipment link aggregation group, thereby enabling a third VXLAN tunnel endpoint equipment and a fourth VXLAN tunnel endpoint equipment in the second cross equipment link aggregation group to receive and store the EVPN route corresponding to the first cross equipment link aggregation group; under the condition of link failure or equipment failure, the EVPN route learned based on the non-failure link between the VXLAN tunnel endpoint equipment and another SPINE equipment can be determined, so that the VXLAN tunnel between the VXLAN tunnel endpoint equipment keeps an operation state, thereby ensuring the flow forwarding on the VXLAN tunnel endpoint equipment, and avoiding the technical problem of packet loss caused by the failure of the VXLAN tunnel due to the flow from Hash to the VTEP equipment. The technical problem that in the existing SPINE leaf structure of the double SPINE, under the condition that a link between the VTEP equipment and one of the SPINE equipment fails, or one of the SPINE equipment fails and a route on the VTEP equipment is learned from the SPINE equipment, an Overlay route between the VTEP equipment and the SPINE equipment is withdrawn, a VXLAN tunnel is down, and therefore traffic packet loss from Hash to the VTEP equipment is caused is solved.
The following describes in detail the technical solution proposed in the embodiments of the present application through the accompanying drawings.
Fig. 1 is a flow chart of a method for processing EVPN routing in a dual SPINE MLAG environment according to an embodiment of the present application. As shown in fig. 1, a method for processing EVPN routing in a dual SPINE MLAG environment according to an embodiment of the present application mainly includes the following steps:
101. and establishing an Underlay route between each VXLAN tunnel endpoint device and two SPINE devices respectively, determining a first cross-device link aggregation group and a second cross-device link aggregation group, and determining virtual addresses corresponding to the first cross-device link aggregation group and the second cross-device link aggregation group.
When the VTEP is accessed into the physical topology of the SPINE structure, dual SPINE devices and MLAG are provided to ensure the service stability between HOSTs. HOST is simultaneously in butt joint with two VTEP devices, an MLAG (multi-layer network gateway) is formed between the VTEP devices, reliability is provided for HOST access, the VTEP devices are interconnected with two SPINE devices, and when one of the SPINE devices fails, service between HOSTs can guarantee service intercommunication through the other SPINE device.
Firstly, a server establishes an underway route between each VXLAN tunnel endpoint VTEP device and two SPINE devices respectively, determines a first cross device link aggregation group and a second cross device link aggregation group corresponding to the VTEP devices, and determines a virtual address corresponding to the first cross device link aggregation group and a virtual address corresponding to the second cross device link aggregation group.
The server determines a first cross-device link aggregation group formed by the first VXLAN tunnel endpoint device and the second VXLAN tunnel endpoint device, takes the first cross-device link aggregation group as a gateway of the first VXLAN tunnel endpoint device and the second VXLAN tunnel endpoint device, determines a second cross-device link aggregation group formed by the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device, and takes the second cross-device link aggregation group as a gateway of the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device.
The server configures the same virtual address for the first VXLAN tunnel endpoint device and the second VXLAN tunnel endpoint device in the first cross-device link aggregation group, so as to obtain a virtual address corresponding to the first cross-device link aggregation group, and simultaneously configures the same virtual address for the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device in the second cross-device link aggregation group, so as to obtain a virtual address corresponding to the second cross-device link aggregation group.
Fig. 2 is a schematic structural diagram of another method for processing EVPN routing in a dual SPINE MLAG environment according to an embodiment of the present application. As shown in fig. 2, the application discloses EVPN routing in a dual SPINE MLAG environment, where a server forms a first cross-device link aggregation group with a VTEP1 device and a VTEP2 device, i.e., a first VXLAN tunnel endpoint device and a second VXLAN tunnel endpoint device, and forms a second cross-device link aggregation group with a VTEP3 device and a VTEP4 device, i.e., a third VXLAN tunnel endpoint device and a fourth VXLAN tunnel endpoint device. The server virtualizes the address LOOP0 a.a.a/32 of the VTEP1 device as a virtual address corresponding to the first cross-device link aggregation group, namely LOOP1 e.e.e.e/32, virtualizes the address LOOP0 b.b.b/32 of the VTEP2 device as a virtual address corresponding to the first cross-device link aggregation group, namely LOOP1 e.e.e/32, virtualizes the address LOOP0 c.c.c/32 of the VTEP3 device as a virtual address corresponding to the second cross-device link aggregation group, namely LOOP1 f.f.f.f.f/32, and virtualizes the address LOOP0 d.d.d.d/32 of the VTEP4 device as a virtual address corresponding to the second cross-device link aggregation group, namely LOOP1 f.f.f.f/32. The VTEP1 device and the VTEP2 device are connected through the peer-link, and the VTEP3 device and the VTEP4 device are also connected through the peer-link.
Under the condition that a link between the VTEP3 equipment and the SPINE1 equipment fails, an EVPN route corresponding to a first cross-equipment link aggregation group learned from the SPINE2 equipment is found in the VTEP3 equipment, namely EVPN routes corresponding to the first VXLAN tunnel endpoint equipment and the second VXLAN tunnel endpoint equipment, so that the VXLAN tunnel can be kept in an UP running state, traffic forwarding on the VTEP3 equipment can be realized, and the technical problem of traffic packet loss from a Hash to the VTEP3 equipment caused by the failure of the VXLAN tunnel between the VTEP3 equipment and other VTEP equipment can be avoided.
In one embodiment of the present application, before determining the first cross-device link aggregation group and the second cross-device link aggregation group, the server further needs to determine that two VXLAN tunnel endpoint devices corresponding to the first cross-device link aggregation group do not overlap with two VXLAN tunnel endpoint devices corresponding to the second cross-device link aggregation group.
In one embodiment of the application, after determining virtual addresses corresponding to the first cross-device link aggregation group and the second cross-device link aggregation group, the server establishes a VXLAN tunnel between the first VXLAN tunnel endpoint device and the second VXLAN tunnel endpoint device in the first cross-device link aggregation group and between the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device in the second cross-device link aggregation group based on the virtual addresses corresponding to the first cross-device link aggregation group and the virtual addresses corresponding to the second cross-device link aggregation group, and then forwards traffic among the first VXLAN tunnel endpoint device, the second VXLAN tunnel endpoint device, the third VXLAN tunnel endpoint device, and the fourth VXLAN tunnel endpoint device through the VXLAN tunnel.
102. And establishing BGP neighbor relations between the first cross-device link aggregation group and the second cross-device link aggregation group and the two SPINE devices according to the corresponding virtual addresses, so that the two SPINE devices learn the next hop address of the first cross-device link aggregation group, and obtain corresponding EVPN routes.
The server establishes BGP neighbor relations between the first cross-device link aggregation group and the second cross-device link aggregation group respectively with two SPINE devices according to the virtual address corresponding to the first cross-device link aggregation group and the virtual address corresponding to the second cross-device link aggregation group, so that the two SPINE devices can learn the next hop address of the first cross-device link aggregation group based on the established BGP neighbor relations, and the EVPN route corresponding to the first VXLAN tunnel endpoint device and the second VXLAN tunnel endpoint device in the first cross-device link aggregation group is obtained.
In one embodiment of the present application, after establishing BGP neighbor relations between a first inter-device link aggregation group and a second inter-device link aggregation group and two pline devices according to corresponding virtual addresses, a server sends an EVPN route corresponding to a first VXLAN tunnel endpoint device and a second VXLAN tunnel endpoint device in the first inter-device link aggregation group to the first pline device and the second pline device in the two pline devices based on virtual addresses corresponding to the first inter-device link aggregation group, and then learns a next hop address corresponding to the first VXLAN tunnel endpoint device and the second VXLAN tunnel endpoint device in the first inter-device link aggregation group based on EVPN route corresponding to the first VXLAN tunnel endpoint device and the second VXLAN tunnel endpoint device, so that the first pline device and the second pline device can obtain the EVPN route corresponding to the first VXLAN tunnel endpoint device and the second VXLAN tunnel endpoint device.
103. And forwarding the EVPN route corresponding to the first cross-device link aggregation group to the second cross-device link aggregation group through the two SPINE devices, so that the EVPN route corresponding to the first cross-device link aggregation group is received and stored by the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device in the second cross-device link aggregation group.
The server, through a first SPINE device and a second SPINE device in the two SPINE devices, can forward the EVPN route corresponding to the first cross-device link aggregation group, namely the EVPN route corresponding to the first VXLAN tunnel endpoint device and the second VXLAN tunnel endpoint device, to the second cross-device link aggregation group, so that the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device in the second cross-device link aggregation group can receive the EVPN route corresponding to the first cross-device link aggregation group, and the EVPN route corresponding to the first cross-device link aggregation group is respectively stored in the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device.
Specifically, the server sends EVPN routes corresponding to the first cross-device link aggregation group learned by a first of the two pieces of SPINE equipment to a third and a fourth VXLAN tunnel endpoint equipment in the second cross-device link aggregation group, respectively, based on virtual addresses corresponding to the second cross-device link aggregation group, and the server stores EVPN routes corresponding to the first cross-device link aggregation group learned by the second of the two pieces of SPINE equipment to a third and a fourth VXLAN tunnel endpoint equipment in the second cross-device link aggregation group, respectively, and then receives EVPN routes sent by the first SPINE equipment and EVPN routes sent by the second SPINE equipment to the third and fourth VXLAN tunnel endpoint equipment through the third and fourth VXLAN tunnel endpoint equipment, and stores the EVPN routes sent by the first SPINE equipment and the second SPINE equipment to the third and fourth VXLAN tunnel endpoint equipment.
104. And under the condition of link failure or equipment failure, determining the EVPN route learned based on a non-failure link between the corresponding VXLAN tunnel endpoint equipment and another SPINE equipment, and realizing traffic forwarding on the VXLAN tunnel endpoint equipment.
Under the condition of link failure or equipment failure, the server can determine the EVPN route learned based on the non-failure link between the VXLAN tunnel endpoint equipment corresponding to the failure and another SPINE equipment, so that the VXLAN tunnel keeps an operation state, and further, the traffic forwarding on the VXLAN tunnel endpoint equipment can be realized.
Specifically, when any VXLAN tunnel endpoint device in the second inter-device link aggregation group fails to a link between any VXLAN tunnel endpoint device and any spin device in the two spin devices, or any spin device in the two spin devices fails, the server withdraws the Overlay route between the VXLAN tunnel endpoint device and the corresponding spin device, and then determines, in the VXLAN tunnel endpoint device, an EVPN route learned from the other spin device based on a non-failed link between the VXLAN tunnel endpoint device and the other spin device in the two spin devices, so that the VXLAN tunnel endpoint device in the second inter-device link aggregation group and the VXLAN tunnel between the first inter-device link aggregation group can be in an operating state based on the learned EVPN route, thereby realizing traffic forwarding on the VXLAN tunnel endpoint device.
In a conventional implementation, the VTEP device can only store a route sent to it by the SPINE device, and when an upper port where the VTEP device receives the route sent by the SPINE device fails, the route of the EVPN received from the SPINE device in the VTEP device may be withdrawn, and the VXLAN tunnel down may be down. At this time, the VTEP device needs to learn the EVPN route of another SPINE device again, and during route learning, a packet on the VTEP device may be lost.
The application provides a method for processing EVPN routes under a dual SPINE MLAG environment, which enables VTEP1 equipment and VTEP2 equipment to form a cross-equipment link aggregation group, so that the VTEP3 equipment and the VTEP4 equipment can simultaneously store the EVPN routes sent by different SPINE equipment, and under the condition that one SPINE equipment breaks down, the EVPN route sent by the other SPINE equipment is optimized, thereby enabling a VXLAN tunnel not to be down, keeping an UP running state, avoiding the problem of packet loss and improving the forwarding efficiency of service messages.
The foregoing is a method embodiment presented herein. Based on the same inventive concept, the embodiment of the present application also provides an apparatus for processing EVPN routing in a dual SPINE MLAG environment, and the structure thereof is shown in fig. 3.
Fig. 3 is a schematic internal structure of an apparatus for processing EVPN routing in a dual SPINE MLAG environment according to an embodiment of the present application. As shown in fig. 3, the apparatus includes:
at least one processor;
and a memory communicatively coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor, the instructions being executable by the at least one processor to enable the at least one processor to:
establishing an Underlay route between each VXLAN tunnel endpoint device and two SPINE devices respectively, determining a first cross-device link aggregation group and a second cross-device link aggregation group, and determining virtual addresses corresponding to the first cross-device link aggregation group and the second cross-device link aggregation group;
establishing BGP neighbor relations between the first cross-device link aggregation group and the second cross-device link aggregation group and two SPINE devices according to the corresponding virtual addresses, so that the two SPINE devices learn the next hop address of the first cross-device link aggregation group and obtain corresponding EVPN routes;
forwarding the EVPN route corresponding to the first cross-device link aggregation group to a second cross-device link aggregation group through two SPINE devices, so that a third VXLAN tunnel endpoint device and a fourth VXLAN tunnel endpoint device in the second cross-device link aggregation group receive and store the EVPN route corresponding to the first cross-device link aggregation group;
And under the condition of link failure or equipment failure, determining the EVPN route learned based on a non-failure link between the corresponding VXLAN tunnel endpoint equipment and another SPINE equipment, and realizing traffic forwarding on the VXLAN tunnel endpoint equipment.
The embodiments of the present application also provide a nonvolatile computer storage medium storing computer executable instructions configured to:
establishing an Underlay route between each VXLAN tunnel endpoint device and two SPINE devices respectively, determining a first cross-device link aggregation group and a second cross-device link aggregation group, and determining virtual addresses corresponding to the first cross-device link aggregation group and the second cross-device link aggregation group;
establishing BGP neighbor relations between the first cross-device link aggregation group and the second cross-device link aggregation group and two SPINE devices according to the corresponding virtual addresses, so that the two SPINE devices learn the next hop address of the first cross-device link aggregation group and obtain corresponding EVPN routes;
forwarding the EVPN route corresponding to the first cross-device link aggregation group to a second cross-device link aggregation group through two SPINE devices, so that a third VXLAN tunnel endpoint device and a fourth VXLAN tunnel endpoint device in the second cross-device link aggregation group receive and store the EVPN route corresponding to the first cross-device link aggregation group;
And under the condition of link failure or equipment failure, determining the EVPN route learned based on a non-failure link between the corresponding VXLAN tunnel endpoint equipment and another SPINE equipment, and realizing traffic forwarding on the VXLAN tunnel endpoint equipment.
In the 90 s of the 20 th century, improvements to one technology could clearly be distinguished as improvements in hardware (e.g., improvements to circuit structures such as diodes, transistors, switches, etc.) or software (improvements to the process flow). However, with the development of technology, many improvements of the current method flows can be regarded as direct improvements of hardware circuit structures. Designers almost always obtain corresponding hardware circuit structures by programming improved method flows into hardware circuits. Therefore, an improvement of a method flow cannot be said to be realized by a hardware entity module. For example, a programmable logic device (Programmable Logic Device, PLD) (e.g., field programmable gate array (Field Programmable Gate Array, FPGA)) is an integrated circuit whose logic function is determined by the programming of the device by a user. A designer programs to "integrate" a digital system onto a PLD without requiring the chip manufacturer to design and fabricate application-specific integrated circuit chips. Moreover, nowadays, instead of manually manufacturing integrated circuit chips, such programming is mostly implemented by using "logic compiler" software, which is similar to the software compiler used in program development and writing, and the original code before the compiling is also written in a specific programming language, which is called hardware description language (Hardware Description Language, HDL), but not just one of the hdds, but a plurality of kinds, such as ABEL (Advanced Boolean Expression Language), AHDL (Altera Hardware Description Language), confluence, CUPL (Cornell University Programming Language), HDCal, JHDL (Java Hardware Description Language), lava, lola, myHDL, PALASM, RHDL (Ruby Hardware Description Language), etc., VHDL (Very-High-Speed Integrated Circuit Hardware Description Language) and Verilog are currently most commonly used. It will also be apparent to those skilled in the art that a hardware circuit implementing the logic method flow can be readily obtained by merely slightly programming the method flow into an integrated circuit using several of the hardware description languages described above.
The controller may be implemented in any suitable manner, for example, the controller may take the form of, for example, a microprocessor or processor and a computer readable medium storing computer readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, application specific integrated circuits (Application Specific Integrated Circuit, ASIC), programmable logic controllers, and embedded microcontrollers, examples of which include, but are not limited to, the following microcontrollers: ARC 625D, atmel AT91SAM, microchip PIC18F26K20, and Silicone Labs C8051F320, the memory controller may also be implemented as part of the control logic of the memory. Those skilled in the art will also appreciate that, in addition to implementing the controller in a pure computer readable program code, it is well possible to implement the same functionality by logically programming the method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc. Such a controller may thus be regarded as a kind of hardware component, and means for performing various functions included therein may also be regarded as structures within the hardware component. Or even means for achieving the various functions may be regarded as either software modules implementing the methods or structures within hardware components.
The system, apparatus, module or unit set forth in the above embodiments may be implemented in particular by a computer chip or entity, or by a product having a certain function. One typical implementation is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
For convenience of description, the above devices are described as being functionally divided into various units, respectively. Of course, the functions of each element may be implemented in one or more software and/or hardware elements when implemented in the present specification.
It will be appreciated by those skilled in the art that the present description may be provided as a method, system, or computer program product. Accordingly, the present specification embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present description embodiments may take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
The present description is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the specification. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
The description may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for apparatus, devices, non-volatile computer storage medium embodiments, the description is relatively simple, as it is substantially similar to method embodiments, with reference to the section of the method embodiments being relevant.
The foregoing describes specific embodiments of the present disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
The foregoing is merely one or more embodiments of the present description and is not intended to limit the present description. Various modifications and alterations to one or more embodiments of this description will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of one or more embodiments of the present description, is intended to be included within the scope of the claims of the present description.

Claims (10)

1. A method of handling EVPN routing in a dual SPINE MLAG environment, the method comprising:
establishing an Underlay route between each VXLAN tunnel endpoint device and two SPINE devices respectively, determining a first cross-device link aggregation group and a second cross-device link aggregation group, and determining virtual addresses corresponding to the first cross-device link aggregation group and the second cross-device link aggregation group;
establishing BGP neighbor relations between the first cross-device link aggregation group and the second cross-device link aggregation group and the two SPINE devices according to the corresponding virtual addresses, so that the two SPINE devices learn the next hop address of the first cross-device link aggregation group and obtain corresponding EVPN routes;
forwarding, by the two pieces of pline equipment, the EVPN route corresponding to the first span equipment link aggregation group to the second span equipment link aggregation group, so that a third VXLAN tunnel endpoint equipment and a fourth VXLAN tunnel endpoint equipment in the second span equipment link aggregation group receive and store the EVPN route corresponding to the first span equipment link aggregation group;
and under the condition of link failure or equipment failure, determining the EVPN route learned based on a non-failure link between the corresponding VXLAN tunnel endpoint equipment and another SPINE equipment, and realizing traffic forwarding on the VXLAN tunnel endpoint equipment.
2. The method according to claim 1, wherein in the case of a link failure or a device failure, determining an EVPN route learned based on a non-failed link between a corresponding VXLAN tunnel endpoint device and another pline device, and implementing traffic forwarding on the VXLAN tunnel endpoint device, specifically comprises:
in the case that a link between any VXLAN tunnel endpoint device in the second inter-device link aggregation group and any spin device in the two spin devices fails, or any spin device in the two spin devices fails, the Overlay route between the VXLAN tunnel endpoint device and the corresponding spin device is withdrawn;
determining an EVPN route learned from the other SPINE device based on a non-fault link between the VXLAN tunnel endpoint device and the other SPINE device in the two SPINE devices in the VXLAN tunnel endpoint device;
and based on the EVPN route, the VXLAN tunnel endpoint equipment in the second cross-equipment link aggregation group and the VXLAN tunnel between the first cross-equipment link aggregation group are in an operation state, so that traffic forwarding on the VXLAN tunnel endpoint equipment is realized.
3. The method for processing EVPN routing in a dual SPINE MLAG environment of claim 1, wherein said determining a first and second set of cross-device link aggregations comprises:
determining a first cross-device link aggregation group consisting of a first VXLAN tunnel endpoint device and a second VXLAN tunnel endpoint device, and taking the first cross-device link aggregation group as a gateway of the first VXLAN tunnel endpoint device and the second VXLAN tunnel endpoint device;
and determining a second cross-device link aggregation group consisting of the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device, and taking the second cross-device link aggregation group as a gateway of the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device.
4. The method for processing EVPN routing in a dual SPINE MLAG environment of claim 1, wherein said determining virtual addresses corresponding to said first and second cross-device link aggregation groups comprises:
configuring the same virtual address for a first VXLAN tunnel endpoint device and a second VXLAN tunnel endpoint device in the first cross-device link aggregation group to obtain a virtual address corresponding to the first cross-device link aggregation group;
And configuring the same virtual address for the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device in the second cross-device link aggregation group to obtain the virtual address corresponding to the second cross-device link aggregation group.
5. The method of claim 1, wherein after establishing BGP neighbor relations between the first and second inter-device link aggregation groups and the two SPINE devices according to the corresponding virtual addresses, the method further comprises:
based on the virtual address corresponding to the first inter-equipment link aggregation group, an EVPN route corresponding to the first VXLAN tunnel endpoint equipment and the second VXLAN tunnel endpoint equipment in the first inter-equipment link aggregation group is sent to a first SPINE equipment and a second SPINE equipment in the two SPINE equipment;
and based on the corresponding EVPN route, the first SPINE equipment and the second SPINE equipment learn the next hop address corresponding to the first VXLAN tunnel endpoint equipment and the second VXLAN tunnel endpoint equipment in the first cross-equipment link aggregation group so as to obtain the corresponding EVPN route.
6. The method according to claim 1, wherein the forwarding, by the two pline devices, the EVPN route corresponding to the first cross-device link aggregation group to the second cross-device link aggregation group so that the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device in the second cross-device link aggregation group receive and store the EVPN route corresponding to the first cross-device link aggregation group, specifically includes:
based on the virtual address corresponding to the second cross-equipment link aggregation group, the corresponding EVPN route learned by the first SPINE equipment in the two SPINE equipment is respectively sent to a third VXLAN tunnel endpoint equipment and a fourth VXLAN tunnel endpoint equipment in the second cross-equipment link aggregation group;
based on the virtual address corresponding to the second cross-equipment link aggregation group, the corresponding EVPN route learned by the second SPINE equipment in the two SPINE equipment is respectively sent to a third VXLAN tunnel endpoint equipment and a fourth VXLAN tunnel endpoint equipment in the second cross-equipment link aggregation group;
and receiving the EVPN route sent by the first SPINE equipment and the EVPN route sent by the second SPINE equipment through the third VXLAN tunnel endpoint equipment and the fourth VXLAN tunnel endpoint equipment, and storing the EVPN route sent by the first SPINE equipment and the EVPN route sent by the second SPINE equipment into the third VXLAN tunnel endpoint equipment and the fourth VXLAN tunnel endpoint equipment.
7. The method of processing EVPN routing in a dual SPINE MLAG environment of claim 1, wherein after said determining virtual addresses corresponding to said first and second cross-device link aggregation groups, said method further comprises:
based on the virtual address corresponding to the first cross-device link aggregation group and the virtual address corresponding to the second cross-device link aggregation group, a VXLAN tunnel is established between a first VXLAN tunnel endpoint device and a second VXLAN tunnel endpoint device in the first cross-device link aggregation group and between a third VXLAN tunnel endpoint device and a fourth VXLAN tunnel endpoint device in the second cross-device link aggregation group;
and forwarding traffic among the first VXLAN tunnel endpoint device, the second VXLAN tunnel endpoint device, the third VXLAN tunnel endpoint device and the fourth VXLAN tunnel endpoint device through the VXLAN tunnel.
8. The method of processing EVPN routing in a dual SPINE MLAG environment of claim 1, wherein prior to said determining the first and second cross-device link aggregation groups, the method further comprises:
And determining that two VXLAN tunnel endpoint devices corresponding to the first cross-device link aggregation group are not overlapped with two VXLAN tunnel endpoint devices corresponding to the second cross-device link aggregation group.
9. An apparatus for handling EVPN routing in a dual SPINE MLAG environment, the apparatus comprising:
at least one processor;
and a memory communicatively coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a method of handling EVPN routing in a dual SPINE MLAG environment as claimed in any one of claims 1-8.
10. A non-transitory computer storage medium storing computer-executable instructions, the computer-executable instructions configured to:
a method of handling EVPN routing in a dual SPINE MLAG environment as claimed in any one of claims 1-8.
CN202310031537.3A 2023-01-10 Method, equipment and medium for processing EVPN route under double SPINE MLAG environment Active CN116248584B (en)

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