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EVPN为啥传递不了路由？

2025-02-25提问

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ysigmap

ysigmap 零段

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问题描述：

拓扑：leaf_1 --- spine --- leaf_2；172.16.x.x的地址为互联地址，1.1.1.1、3.3.3.3、4.4.4.4分别为spine，leaf_1、leaf_2的loopback0的地址，vxlan还没有配置。

拓扑用EBGP传递loopback地址的路由，然后evpn也是用ebgp来传递的。且所有peer都为Established状态

目前在leaf上没有发现loopback0口的evpn路由。

[leaf_1]dis bgp l2vpn evpn

Total number of routes: 0

组网及组网描述：

leaf_1:

bgp 100

router-id 3.3.3.3

timer keepalive 3 hold 9

group evpn external

peer evpn as-number 65000

peer evpn connect-interface LoopBack0

peer evpn ebgp-max-hop 64

peer evpn route-update-interval 0

peer evpn timer connect-retry 5

group link external

peer link as-number 65000

peer link route-update-interval 0

peer link timer connect-retry 5

peer 1.1.1.1 group evpn

peer 172.16.11.1 group link

peer 172.16.21.1 group link

address-family ipv4 unicast

balance 16

import-route direct

peer link enable

address-family l2vpn evpn

peer evpn enable

leaf_2:

bgp 200

router-id 4.4.4.4

timer keepalive 3 hold 9

group evpn external

peer evpn as-number 65000

peer evpn connect-interface LoopBack0

peer evpn ebgp-max-hop 64

peer evpn route-update-interval 0

peer evpn timer connect-retry 5

group link external

peer link as-number 65000

peer link route-update-interval 0

peer link timer connect-retry 5

peer 1.1.1.1 group evpn

peer 172.16.12.1 group link

peer 172.16.22.1 group link

address-family ipv4 unicast

balance 16

import-route direct

peer link enable

address-family l2vpn evpn

peer evpn enable

spine:

bgp 65000

router-id 1.1.1.1

timer keepalive 3 hold 9

group evpn external

peer evpn connect-interface LoopBack0

peer evpn ebgp-max-hop 64

peer evpn route-update-interval 0

peer evpn timer connect-retry 5

group link external

peer link route-update-interval 0

peer link timer connect-retry 5

peer 3.3.3.3 as-number 100

peer 3.3.3.3 group evpn

peer 4.4.4.4 as-number 200

peer 4.4.4.4 group evpn

peer 172.16.11.2 as-number 100

peer 172.16.11.2 group link

peer 172.16.12.2 as-number 200

peer 172.16.12.2 group link

address-family ipv4 unicast

balance 16

import-route direct

peer link enable

address-family l2vpn evpn

undo policy vpn-target

peer evpn enable

最佳答案

zhiliao_v6hOyc

zhiliao_v6hOyc 九段

粉丝：23人关注：1人

为了确保Leaf设备能够通过EVPN发布其Loopback0接口的路由，您需要在BGP EVPN地址族视图下，配置`peer next-hop-local`命令。这将强制BGP将路由下一跳修改为自己的地址，从而使得Loopback0接口的EVPN路由能够被正确地发布给IBGP/MP-IBGP邻居。请在Leaf设备上执行以下命令，以确保Loopback0接口的EVPN路由能够被正确发布： ``` [Leaf-bgp-default-evpn] peer next-hop-local ``` 其中，``应替换为实际的IBGP邻居地址。这将确保Leaf设备的Loopback0接口EVPN路由能够被正确地发布给IBGP邻居。请注意，这个操作需要在所有需要发布Loopback接口EVPN路由的设备上执行。