The peer advertise route-reoriginated command enables a device to advertise IP prefix routes re-encapsulated by the EVPN address family to a BGP EVPN peer.
The undo peer advertise route-reoriginated command restores the default configuration.
By default, the local device does not advertise IP prefix routes re-encapsulated by the EVPN address family to a BGP EVPN peer.
peer { ipv4-address | group-name } advertise route-reoriginated evpn ip
undo peer { ipv4-address | group-name } advertise route-reoriginated evpn ip
| Parameter | Description | Value |
|---|---|---|
| ipv4-address | Specifies the IPv4 address of a BGP EVPN peer. | The value is in dotted decimal notation. |
| group-name | Specifies the name of a BGP EVPN peer group. | The name is a string of 1 to 47 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string. |
| evpn | Re-encapsulates the received EVPN routes. | - |
| ip | Re-encapsulates the IP prefix routes in the received EVPN routes. | - |
Usage Scenario
In three-segment VXLAN scenarios, to re-encapsulate EVPN routes received from a DC into IP prefix routes and then send them to the BGP EVPN peer in another DC, run the peer advertise route-reoriginated command. This configuration allows communication between VMs in different DCs.
During EVPN route re-encapsulation, a border leaf node receives an EVPN route from a DC and changes the route next hop to the VTEP address of the leaf node. Additionally, the leaf node replaces the source MAC address in the gateway MAC attribute of the host route with its own MAC address and the L3VNI with that of an L3VPN instance.
Prerequisites
The device has been enabled to add a regeneration flag to the routes received from BGP EVPN peers using the peer { ipv4-address | group-name } import reoriginate command.
# Enable a device to advertise regenerated IP prefix routes to a BGP EVPN peer.
<HUAWEI> system-view [HUAWEI] bgp 100 [HUAWEI-bgp] peer 2.2.2.2 as-number 100 [HUAWEI-bgp] l2vpn-family evpn [HUAWEI-bgp-af-evpn] peer 2.2.2.2 enable [HUAWEI-bgp-af-evpn] peer 2.2.2.2 import reoriginate [HUAWEI-bgp-af-evpn] peer 2.2.2.2 advertise route-reoriginated evpn ip