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Controlling BGP path selection > Configuring the default local preference

 

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Configuring the default local preference

The local preference is used to determine the optimal route for traffic leaving the local AS. When a BGP router obtains from several IBGP peers multiple routes to the same destination, but with different next hops, it considers the route with the highest local preference as the optimal route.

This task allows you to specify the default local preference for routes sent to IBGP peers.

To specify the default local preference (IPv4 unicast/multicast address family):

Step

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter BGP IPv4 unicast address family view, BGP-VPN IPv4 unicast address family view, or BGP IPv4 multicast address family view.

  • Enter BGP IPv4 unicast address family view:

    1. bgp as-number [ instance instance-name ]

    2. address-family ipv4 [ unicast ]

  • Enter BGP-VPN IPv4 unicast address family view:

    1. bgp as-number [ instance instance-name ]

    2. ip vpn-instance vpn-instance-name

    3. address-family ipv4 [ unicast ]

  • Enter BGP IPv4 multicast address family view:

    1. bgp as-number [ instance instance-name ]

    2. address-family ipv4 multicast

N/A

3. Configure the default local preference.

default local-preference value

The default local preference is 100.

To specify the default local preference (IPv6 unicast/multicast address family):

Step

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter BGP IPv6 unicast address family view, BGP-VPN IPv6 unicast address family view, or BGP IPv6 multicast address family view.

  • Enter BGP IPv6 unicast address family view:

    1. bgp as-number [ instance instance-name ]

    2. address-family ipv6 [ unicast ]

  • Enter BGP-VPN IPv6 unicast address family view:

    1. bgp as-number [ instance instance-name ]

    2. ip vpn-instance vpn-instance-name

    3. address-family ipv6 [ unicast ]

  • Enter BGP IPv6 multicast address family view:

    1. bgp as-number [ instance instance-name ]

    2. address-family ipv6 multicast

N/A

3. Configure the default local preference.

default local-preference value

The default local preference is 100.

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