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• Method 1—Execute the pic command in BGP address family view. BGP calculates a backup
next hop for a BGP route in the address family if there are two or more unequal-cost routes that
reaches the destination.
• Method 2—Execute the fast-reroute route-policy command to reference a routing policy in
which a backup next hop is specified by using the apply [ ipv6 ] fast-reroute backup-nexthop
command. The backup next hop calculated by BGP must be the same as the specified backup
next hop. Otherwise, BGP does not generate a backup next hop for the primary route. You can
also configure if-match clauses in the routing policy to identify the routes protected by FRR.
If both methods are configured, Method 2 takes precedence over Method 1.
BGP supports FRR for IPv4 and IPv6 unicast routes, but not for IPv4 and IPv6 multicast routes.
To configure BGP FRR (IPv4 unicast address family):
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Configure the source
address of echo packets.
bfd echo-source-ip
ip-address
By default, no source address is
specified for echo packets.
This step is required when
echo-mode BFD is used to detect the
connectivity to the next hop of the
primary route.
Specify a source IP address that does
not belong to any local network.
For more information about this
command, see High Availability
Command Reference.
3. Create a routing policy and
enter routing policy view.
route-policy
route-policy-name
permit
node
node-number
By default, no routing policy is
created.
This step is required when Method 2
is used to enable BGP FRR.
For more information about this
command, see Layer 3—IP Routing
Command Reference.
4. Set the backup next hop for
FRR.
apply fast-reroute
backup-nexthop
ip-address
By default, no backup next hop is set.
This step is required when Method 2
is used to enable BGP FRR.
For more information about this
command, see Layer 3—IP Routing
Command Reference.
5. Return to system view.
quit
N/A
6. Enter BGP view.
bgp
as-number
N/A
7. (Optional.) Use echo-mode
BFD to detect the
connectivity to the next hop
of the primary route.
primary-path-detect bfd
echo
By default, ARP is used to detect the
connectivity to the next hop.
8. (Optional.) Enter BGP-VPN
instance view.
ip vpn-instance
vpn-instance-name
N/A
9. Enter BGP IPv4 unicast
address family view or
BGP-VPN IPv4 unicast
address family view.
address-family ipv4
[
unicast
]
N/A
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