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ME60 V800R010C10SPC500 Configuration Guide - IP Routing 01

This is ME60 V800R010C10SPC500 Configuration Guide - IP Routing
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Setting a Specified Peer or Each Peer in a Peer Group as an Independent Update Peer-Group

Setting a Specified Peer or Each Peer in a Peer Group as an Independent Update Peer-Group

Setting a specified peer or each peer in a peer group as an independent update peer-group prevents routes learned from the peer from being sent back to the peer.

Usage Scenario

To improve the efficiency of route advertisement, BGP uses the dynamic update peer-group mechanism. The BGP peers with the same configurations are placed in an update peer-group. These routes are grouped once and then sent to all peers in the update peer-group. However, the routes learned from a peer may be sent back to the peer, for example, the preferred route learned from an EBGP peer is sent back to the EBGP peer, or the preferred route that an RR learns from a client is reflected back to the client. In this case, messages are discarded, wasting network resources.

To address this problem, you can set a specified peer or each peer in a peer group as an independent update peer-group so that the routes learned from the peer are not sent back to the peer.

NOTE:
Setting a specified peer or each peer in a peer group as an independent update peer-group can be performed in multiple address families. This section uses the BGP-IPv6 unicast address family as an example. For details about the address families supported, see peer update-group-independent.

Pre-configuration Tasks

Before setting a specified peer or each peer in a peer group as an independent update peer-group, configure basic BGP4+ functions.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run bgp { as-number-plain | as-number-dot }

    The BGP view is displayed.

  3. Run ipv6-family unicast

    The IPv6 unicast address family view is displayed.

  4. Set a specified peer or each peer in a peer group as an independent update peer-group.

    NOTE:

    The configuration of a peer takes precedence over that of the peer group to which the peer belongs.

    • To set a specified peer as an independent update peer-group, run the peer { ipv4-address | ipv6-address } update-group-independent enable command.
    • To set each peer in a peer group as an independent update peer-group, run the peer group-name update-group-independent command.

  5. Run commit

    The configuration is committed.

Checking the Configurations

After setting a specified peer or each peer in a peer group as an independent update peer-group, check the configurations.

Run the display bgp ipv6 update-peer-group command to check information about update peer-groups.

# Run the display bgp ipv6 update-peer-group command. The command output shows information about one update peer-group.
<HUAWEI> display bgp ipv6 update-peer-group
 The Public instance's update peer group number : 1
 Keep buffer update peer group number : 0
 BGP Version : 4

 Group ID : 0 
 Group Type : external 
 Addr Family : IPv6-UNC 
 AdvMinTimeVal : 30 
 Total Peers : 1 
 Leader Peer : 192.168.1.2 
 Peers List : 192.168.1.2 
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Updated: 2019-01-04

Document ID: EDOC1100059437

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