reflector cluster-id (BGP-MVPN address family view)

Function

The reflector cluster-id command sets a cluster ID for an RR.

The undo reflector cluster-id command restores the default setting.

By default, each RR uses its Router ID as the cluster ID.

Format

reflector cluster-id { cluster-id-value | cluster-id-ipv4 }

undo reflector cluster-id

Parameters

Parameter	Description	Value
cluster-id-value	Specifies a cluster ID in the format of a decimal value.	The value is an integer ranging from 1 to 4294967295.
cluster-id-ipv4	Specifies a cluster ID in the format of an IPv4 address.	The value is in dotted decimal notation.

Parameter

Description

Value

cluster-id-value

Specifies a cluster ID in the format of a decimal value.

The value is an integer ranging from 1 to 4294967295.

cluster-id-ipv4

Specifies a cluster ID in the format of an IPv4 address.

The value is in dotted decimal notation.

Views

BGP-MVPN address family view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
bgp	write

Usage Guidelines

Usage Scenario

Sometimes, more than one RR needs to be configured in a cluster to improve network reliability and prevent single-point failures. If a cluster has more than one RR, the reflector cluster-id command needs to be used to set the same cluster ID for the RRs. This helps to identify the cluster and avoid routing loops.

Configuring an RR allows IBGP peers to advertise routes learned in the local AS to each other. The Cluster_List attribute is introduced to avoid loops within an AS. The Cluster_List is composed of a series of Cluster_IDs. It records all the RRs through which a route passes.

Precautions

To ensure that a client can learn the routes reflected by an RR, the Cluster ID configured on the RR must be different from the Cluster ID of the client (By default, the client uses its Router ID as the cluster ID). If the Cluster ID is the same as the Cluster ID of the client, the client discards received routes.

Example

# Configure the cluster ID to 50 for the device, which is an RR in a cluster.

<HUAWEI> system-view
[~HUAWEI] bgp 100
[*HUAWEI-bgp] ipv4-family mvpn
[*HUAWEI-bgp-af-mvpn] reflector cluster-id 50