3Com MSR 50, MSR 30 manual Default local-preferenceIPv6 address family view, 1225

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default local-preference(IPv6 address family view)

Syntax default local-preference value

undo default local-preference

View IPv6 address family view

Parameters value: Default local preference, in the range 0 to 4294967295. The larger the value is, the higher the preference is.

Description Use the default local-preferencecommand to configure the default local preference.

Use the undo default local-preferencecommand to restore the default value.

By default, the default local preference is 100.

Use this command to affect IPv6 BGP route selection.

Examples # Two devices A and B in the same AS are connected to another AS. Change the local preference of B from default value 100 to 180, making the route passing B preferred.

<Sysname> system-view [Sysname] bgp 100 [Sysname-bgp] ipv6-family

[Sysname-bgp-af-ipv6] default local-preference 180

default med (IPv6 address family view)

Syntax default med med-value

undo default med

View IPv6 address family view

Parameters med-value: MED value, in the range 0 to 4294967295.

Description Use the default med command to specify the default MED value.

Use the undo default med command to restore the default.

By default, the default med-valueis 0.

The multi-exit discriminator (MED) is an external metric of a route. Different from local preference, MED is exchanged between ASs and will stay in the AS once it enters the AS. The route with a lower MED is preferred. When a router running BGP obtains several routes with the identical destination and different next-hops from various external peers, it will select the best route depending on the MED