Ibgp Multipath Load Sharing; Configure Ibgp Multipath Load Sharing - Cisco NCS 5500 Series Configuration Manual

iBGP Multipath Load Sharing

Example:
RP/0/RP0/CPU0:router(config)# router bgp 100
Specifies the autonomous system number and enters the BGP configuration mode, allowing you to configure the BGP
routing process.
Step 3 address-family { vpnv4 unicast | vpnv6 unicast }
Example:
RP/0/RP0/CPU0:router(config-bgp)# address-family vpnv4 unicast
Specifies the address family and enters the address family configuration submode.
Step 4 retain local-label minutes
Example:
RP/0/RP0/CPU0:router(config-bgp-af)# retain local-label 10
Retains the previously allocated local label for the primary path on the primary PE for 10 minutes after reconvergence.
Step 5
commit
Allocated Local Label Retention: Example
The following example shows how to retain the previously allocated local label for the primary path on the
primary PE for 10 minutes after reconvergence:
router bgp 100
address-family l2vpn vpls-vpws
end
iBGP Multipath Load Sharing
When a Border Gateway Protocol (BGP) speaking router that has no local policy configured, receives multiple
network layer reachability information (NLRI) from the internal BGP (iBGP) for the same destination, the
router will choose one iBGP path as the best path. The best path is then installed in the IP routing table of the
router. The iBGP Multipath Load Sharing feature enables the BGP speaking router to select multiple iBGP
paths as the best paths to a destination. The best paths or multipaths are then installed in the IP routing table
of the router.
iBGP Multipath Load Sharing Reference, on page 141

Configure iBGP Multipath Load Sharing

Perform this task to configure the iBGP Multipath Load Sharing:
BGP Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.2.x
30
retain local-label 10
provides additional details.
Implementing BGP