218
1
—Execute the
pic
command in BGP-VPN IPv4 unicast address family view. The
device calculates a backup next hop for each BGP route in the VPN instance if there are two or
more unequal-cost routes to reach the destination.
•
Method
2
—Execute the
fast-reroute route-policy
command in BGP-VPN IPv4 unicast
address family view to use a routing policy. In the routing policy, specify a backup next hop by
using the
apply fast-reroute backup-nexthop
command. The backup next hop calculated by
the device must be the same as the specified backup next hop. Otherwise, the device 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.
To configure MPLS L3VPN FRR:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enable MPLS BFD.
mpls bfd enable
The
mpls bfd enable
command
applies to VPNv4 route backup for
a VPNv4 route and IPv4 route
backup for a VPNv4 route. For
more information about this
command, see
MPLS Command
Reference
.
3.
Configure the source IP
address for BFD echo
packets.
bfd echo-source-ip ip-address
The
bfd echo-source-ip
command is required when
echo-mode BFD is used to detect
primary route connectivity in
VPNv4 route backup for an IPv4
route. For more information about
this command, see
High
Availability Command Reference
.
4.
Use BFD to test the
connectivity of an LSP or
MPLS TE tunnel.
•
Configure BFD to test the
connectivity of the LSP for the
specified FEC:
mpls
bfd
dest-addr
mask-length
[
nexthop
nexthop-address
[
discriminator
local
local-id
remote
remote-id
] ] [
template
template-name
]
•
Configure BFD to test the
connectivity of the MPLS TE
tunnel for the tunnel interface:
a. interface tunnel
number
mode mpls-te
b. mpls
bfd
[
discriminator
local
local-id
remote
remote-id
] [
template
template-name
]
c. quit
By default, BFD is not configured to
test the connectivity of the LSP or
MPLS TE tunnel.
This step is required for VPNv4
route backup for a VPNv4 route
and IPv4 route backup for a VPNv4
route. Use either command
depending on the public tunnel
type.
For more information about the
commands in this step, see
MPLS
Command Reference
.
5.
Create a routing policy
and enter routing policy
view.
route-policy
route-policy-name
permit
node
node-number
By default, no routing policies exist.
This step is required to enable
MPLS L3VPN FRR in Method 2.
For more information about this
command, see
Layer 3—IP
Routing Command Reference
.
6.
Set the backup next hop
for FRR.
apply fast-reroute
backup-nexthop ip-address
By default, no backup next hop
address is set for FRR.