Ipv4 Multihop Bfd; Configure Ipv4 Multihop Bfd - Cisco NCS 5500 Series Configuration Manuals

Implementing BFD
H/W Offload Info:
H/W Offload capability : Y, Hosted NPU
Async Offloaded
Async rx/tx
Platform Info:
NPU ID: 0
Async RTC ID
Async Feature Mask
Async Session ID
Async Tx Key
Async Tx Stats addr : 0x0
Async Rx Stats addr : 0x0

IPv4 Multihop BFD

IPv4 Multihop BFD is a BFD session between two addresses between two nodes. An example of this feature
is a BFD session between PE and CE loopback addresses or BFD sessions between routers that are several
TTL hops away. The applications that support IPv4 Multihop BFD are external and internal BGP. IPv4
Multihop BFD feature supports BFD on arbitrary paths, which can span multiple network hops.
The IPv4 Multihop BFD feature provides sub-second forwarding failure detection for a destination more than
one hop, and up to 255 hops, away. The bfd multihop ttl-drop-threshold command can be used to drop BFD
packets coming from neighbors exceeding a certain number of hops. IPv4 Multihop BFD feature is supported
on all currently supported media-type for BFD singlehop.
A BFD multihop session is set up between a unique source-destination address pair provided by the client. A
session can be set up between two endpoints that have IP connectivity.
IPv4 Multihop BFD feature can be run only on default VRF.

Configure IPv4 Multihop BFD

This section describes how you can configure IPv4 Multihop BFD feature.
Router# configure
Router(config)# bfd
Router(config)# multihop ttl-drop-threshold 225
Router(config)# multipath include location 0/7/CPU0
Router(config)# router bgp 100
Router(config-bgp)# neighbor 209.165.200.225
Router(config-bgp-nbr)# remote-as 2000
Router(config-bgp-nbr)# update-source loopback 1
Router(config-bgp-nbr)# bfd fast-detect
Router(config-bgp-nbr)# bfd multiplier 3
Router(config-bgp-nbr)# bfd minimum-interval 300
Router(config-bgp-nbr-af)# route-policy pass-all in
Router(config-bgp-nbr-af)# route-policy pass-all out
Router(config-bgp-nbr-af)# commit
Running Configuration
bfd
multihop ttl-drop-threshold 225
multipath include location 0/7/CPU0
: Y, Echo Offloaded : N
: 5/4
: 1 Echo RTC ID
: 0x0 Echo Feature Mask
: 0x338 Echo Session ID
: 0x338 Echo Tx Key
Echo Tx Stats addr : 0x0
Echo Rx Stats addr : 0x0
Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x
: 0/6/CPU0
: 0
: 0x0
: 0x0
: 0x0
IPv4 Multihop BFD
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