Configuring Bgp As Number Substitution And Soo Attribute; Configuring Mpls L3Vpn Frr - HP HPE FlexNetwork MSR Router Series Configuration Manual

Configuring BGP AS number substitution and
SoO attribute
When CEs at different sites have the same AS number, configure the BGP AS number substitution
function to avoid route loss.
When a PE uses different interfaces to connect different CEs in a site, the BGP AS number
substitution function introduces a routing loop. To remove the routing loop, configure the SoO
attribute on the PE.
For more information about the BGP AS number substitution function and the SoO attribute, see
"BGP AS number substitution and SoO
To configure BGP AS number substitution and SoO attribute:
Step
1. Enter system view.
2. Enter BGP view.
3. Enter BGP-VPN instance
view.
4. Enable the BGP AS number
substitution function.
5. Enter BGP-VPN IPv4 unicast
address family view.
6. (Optional.) Configure the
SoO attribute for a BGP peer
or peer group.
For more information about the commands in this section, see Layer 3—IP Routing Command
Reference.

Configuring MPLS L3VPN FRR

There are two methods to configure MPLS L3VPN FRR:
•
Method 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 reference a routing policy in which a backup next hop is specified 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
1. Enter system view.
attribute."
Command
system-view
bgp as-number
ip vpn-instance
vpn-instance-name
peer { ip-address [ mask-length ] |
group-name } substitute-as
address-family ipv4 [ unicast ]
peer { group-name | ip-address
[ mask-length ] } soo site-of-origin
Command
system-view
238
Remarks
N/A
N/A
N/A
By default, BGP AS number
substitution is disabled.
N/A
By default, the SoO attribute is not
configured.
Remarks
N/A