Bgp Prefix Independent Convergence For Rib And Fib - Cisco ASR 9000 Series Configuration Manual

BGP Prefix Independent Convergence for RIB and FIB

• address-family vpnv4 unicast
• address-family vpnv6 unicast
Note The address-family l2vpn vpls-vpws does not support additional-path. Hence, the l2vpn service that uses
address-family l2vpn vpls-vpws does not guarantee PIC convergence time.
The 3107 PIC implementation supports these Cisco IOS XR features:
• PIC Edge for 3107
• Traffic Engineering Fast-reroute (TE FRR)—Traffic convergence for core link failure is guaranteed
• L2VPN Service (VPWS)
• L3VPN VPNv4 Service
• 6 PE Service
• 6 VPE Service
Note L2VPN-VPWS service on 3107 BGP PIC is supported from Cisco IOS XR Release 5.1.3.
BGP 3107 PIC Updates for Global Prefixes implementation uses a shared recursive Load Info (RLDI)
forwarding object in place of a Light-Weight recursive (LW-RLDI) object. The RLDI is shared between
multiple leaves, while the LW-RLDI is instantiated per leaf. Sharing helps in handling PIC updates since it
will be prefix independent.
BGP Prefix Independent Convergence for RIB and FIB
BGP PIC for RIB and FIB adds support for static recursive as PE-CE and faster backup activation by using
fast re-route trigger.
The BGP PIC for RIB and FIB feature supports:
• FRR-like trigger for faster PE-CE link down detection, to further reduce the convergence time (Fast
• PIC-edge for static recursive routes.
• BFD single-hop trigger for PIC-Edge without any explicit /32 static route configuration.
• Recursive PIC activation at third level and beyond, on failure trigger at the first (IGP) level.
• BGP path recursion constraints in FIB to ensure that FIB is in sync with BGP with respect to BGP
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
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within 50 milliseconds using verbatim tunnel.
PIC-edge activation).
next-hop resolution.
Implementing BGP
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