R21xx-HP FlexFabric 11900 Layer 3 IP Routing Command Reference

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# In BGP IPv6 unicast address family view, specify the AS path list 1 to filter routes outgoing to the peer
group test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv6-family unicast
[Sysname-bgp-ipv6] peer test as-path-acl 1 export
Related commands
• filter-policy export
• filter-policy import
• ip as-path
• peer filter-policy
• peer prefix-list
• peer route-policy
peer bfd
Use peer bfd to enable BFD for the link to a BGP peer.
Use undo peer bfd to restore the default.
Syntax
peer { ip-address | ipv6-address } bfd
undo peer { ip-address | ipv6-address } bfd
Default
BFD is disabled.
Views
BGP view, BGP-VPN instance view
Predefined user roles
network-admin
Parameters
ip-address: Specifies a peer by its IP address. The peer must have been created.
ipv6-address: Specifies a peer by its IPv6 address. The peer must have been created.
Usage guidelines
BFD helps speed up BGP routing convergence upon link failures. However, if you have enabled GR, use
BFD with caution because BFD might detect a failure before the system performs GR, resulting in GR
failure. If you have enabled both BFD and GR for BGP, do not disable BFD during a GR process to avoid
GR failure.
Examples
# I n B G P v i ew, e n a b l e B F D f o r t h e l i n k t o B G P p e e r 1.1.1.1.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer 1.1.1.1 bfd
# In BGP view, enable BFD for the link to BGP peer 1::1.