Configuring Static Lsp Next Hop Resolve - Cisco NCS 5500 Series Configuration Manual

Configuring Static LSP Next Hop Resolve

Action
P2-F Down
P1-F Down
P1-B Down
Configuring Static LSP Next Hop Resolve
You can specify the outgoing next hop instead of explicitly specifying the outgoing path while configuring
static LSPs. This next hop is resolved using the routing information base (RIB) which provides a list of paths
to auto-configure. While specifying the next hop for the incoming label in a static LSP, you can specify the
next hop address with out the interface using the resolve-nexthop command.
The following restrictions apply for this feature:
• Only supports a single next hop address which may resolve to multiple paths.
• Non-default VRFs are not supported.
• In Cisco IOS-XR 6.2.2, only host routes can be resolved. Host routes are routes with /32 mask for IPv4
Configuration Example
This example shows how to configure the static LSP next hop without specifying the interface using the
resolve-nexthop command.
RP/0/0/CPU0:Router# configure terminal
RP/0/0/CPU0:Router(config)# mpls static
RP/0/0/CPU0:Router(config-mpls-static)# lsp ipv6-2
RP/0/0/CPU0:Router(config-mpls-static-lsp)# in-label 25000 allocate per-prefix 2001:DB8:0:1::
/64
RP/0/0/CPU0:Router(config-mpls-static-lsp)# forward
RP/0/0/CPU0:Router(config-mpls-static-lsp-fwd)# path 1 resolve-nexthop 2001:DB8:0:2::64
out-label pop
RP/0/0/CPU0:Router(config-mpls-static-lsp-fwd)# exit
MPLS Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.2.x
26
Transient State
P2-F NO-FRR to P1-F
P1-F FRR to P1-B
P1-B FRR to P2-B
addresses and /128 mask for IPv6 addresses.
or 24:24:1::/64
Interface Steady State
• P1-F: Down P2-F: Up
• P1-B: Up P2-B: Up
• P1-F: Down P2-F: Down
• P1-B: Up P2-B: Up
• P1-F: Down P2-F: Down
• P1-B: Down P2-B: Up
Implementing MPLS Static Labeling
Forward Steady State
• P1-F: Flow P2-F:
Down
• P1-B: Backup
P2-B: N/A
• P1-F: Down P2-F:
Down
• P1-B: Flow P2-B:
Flow
• P1-F: Down P2-F:
Down
• P1-B: Down P2-B:
Flow