peer reflect-client
Function
The peer reflect-client command configures the local device as the route reflector and the peer or peer group as the client of the route reflector.
The undo peer reflect-client command restores the default setting.
By default, the route reflector and its client are not configured.
Format
peer { group-name | ipv4-address | ipv6-address } reflect-client
undo peer { group-name | ipv4-address | ipv6-address } reflect-client
Parameters
| Parameter | Description | Value |
|---|---|---|
| group-name | Specifies the name of a 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. |
| ipv4-address | Specifies the IPv4 address of a peer. | It is in dotted decimal notation. |
| ipv6-address | Specifies the IPv6 address of a peer. | The value is a 32-digit hexadecimal number, in the format of X:X:X:X:X:X:X:X. |
ipv4-address is valid only in the BGP view, BGP-IPv4 unicast address family view, BGP-IPv4 multicast address family view, BGP-VPN instance IPv4 address family view, BGP-VPNv4 address family view, BGP-IPv6 unicast address family view, BGP-VPNv6 address family view, BGP-VPLS address family view, BGP-L2VPN address family view, BGP L2VPN-AD address family view and BGP-EVPN address family view.
ipv6-address is valid only in the BGP-IPv6 unicast address family view and BGP-VPN instance IPv6 address family view.
Views
BGP view, BGP-IPv4 unicast address family view, BGP-IPv4 multicast address family view, BGP-VPN instance IPv4 address family view, BGP-VPNv4 address family view, BGP-IPv6 unicast address family view, BGP-VPN instance IPv6 address family view, BGP-VPNv6 address family view, BGP-VPLS address family view, BGP-L2VPN address family view, BGP L2VPN-AD address family view, BGP-EVPN address family view
Usage Guidelines
Usage Scenario
Full-meshed connections need to be established between IBGP peers to ensure the connectivity between the IBGP peers. If there are n switches in an AS, n*(n-1)/2 IBGP connections need to be established. A large number of IBGP peer use a lot of network and CPU resources. An RR can be used to solve the problem.
In an AS, one switch functions as an RR and other switches function as clients. The clients establish IBGP connections with the RR. The RR and its clients form a cluster. The RR reflects routes among the clients, and therefore the clients do not need to establish any IBGP connection. Assume that an AS has n devices. If one of the devices functions as a RR, and other devices function as clients, the number of IBGP connections to be established is n-1. This means that network and CPU resources are greatly reduced.
An RR is easy to configure, because it needs to be configured only on the device that functions as a reflector and clients do not need to know that they are clients.
Prerequisites
Peer relationships have been established using the peer as-number command.
Precautions
The device where the peer reflect-client command is run serves as the RR and a specified peer or peer group serves as the client of the RR.
The peer reflect-client command can be only used between IBGP peers or IBGP peer groups.
reflect-client configured in an address family is valid in this family address and cannot be inherited by other address families. Configuring reflect-client in a specified address family is recommended.