HP VPN Firewall Appliances Network Management Command Reference

867
default med (IPv6 address family view/IPv6 BGP-VPN instance
view)
Use default med to specify the default MED value.
Use undo default med to restore the default.
Syntax
default med med-value
undo default med
Default
The default med-value is 0.
Views
IPv6 address family view, IPv6 BGP-VPN instance view
Default command level
2: System level
Parameters
med-value: MED value, in the range of 0 to 4294967295.
Usage guidelines
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 value. In the
case that all other conditions are the same, the system first selects the route with the smaller MED value
as the best route for the autonomous system.
Examples
# Devices A and B belong to AS 100 and device C belongs to AS 200. C is the peer of A and B.
Configure the MED of A as 25 to make C select the path from B.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv6-family
[Sysname-bgp-af-ipv6] default med 25
default-route imported (IPv6 address family view/IPv6
BGP-VPN instance view)
Use default-route imported to enable the redistribution of default route into the IPv6 BGP routing table.
Use undo default-route imported to disable the redistribution.
Syntax
default-route imported
undo default-route imported