BFD flapping for static routes

[akhila.pradhan@wipro.com]

Hi Team,

All Static route BFDs connected to core device are flapping intermittently. I did not see any error logs for the same. only show bfd neighbors details the uptime is showing some hours. Please help me to identify the root cause. Find the attached show tech for both routers.

GUJVODR4CCR01C7609#Show bfd neighbors detail

NeighAddr                         LD/RD    RH/RS     State     Int

10.28.52.1                         3/3     Up        Up        Gi6/17

Session state is UP and not using echo function.

OurAddr: 10.28.52.2

Uptime: 13:05:34

NeighAddr                         LD/RD    RH/RS     State     Int

10.28.52.5                         4/2     Up        Up        Gi6/18

Session state is UP and not using echo function.

OurAddr: 10.28.52.6

Uptime: 13:05:34

GUJVODR4CCR02C7609#Show bfd neighbors detail

NeighAddr                         LD/RD    RH/RS     State     Int

10.28.52.9                         3/1     Up        Up        Gi6/17

Session state is UP and not using echo function.

OurAddr: 10.28.52.10

Uptime: 2d03h

NeighAddr                         LD/RD    RH/RS     State     Int

10.28.52.109                       6/2     Up        Up        Gi6/32

Session state is UP and not using echo function.

OurAddr: 10.28.52.110

Uptime: 14:18:29

Regards

Akhil

[Julio E. Moisa]

Hi

Could you please share the configuration related to the BFD (interface, static routes)? Have you verified with logs if the interfaces are not displaying any error related to connectivity?

Thank you in advance. 

[akhila.pradhan@wipro.com]

Hi Julio,

I have verified the interfaces there is no error or connectivity issue. Please find the attached show tech for your reference.

Regards

Akhil

[sbhadrav@cisco.com]

Perform this task to configure BFD support for static routing. Repeat the steps in this procedure on each BFD neighbor. For more information, see the “Example: Configuring BFD Support for Static Routing” section.

SUMMARY STEPS
1.    enable
2.    configure terminal
3.    interface type number
4.    ip address ip-address mask
5.    bfd interval milliseconds min_rx milliseconds multiplier interval-multiplier
6.    exit
7.    ip route static bfd interface-type interface-number ip-address [group group-name [passive]]
8.    ip route [vrf vrf-name] prefix mask {ip-address | interface-type interface-number [ip-address]} [dhcp] [distance] [name next-hop-name] [permanent | track number] [tag tag]
9.    exit
10.    show ip static route
11.    show ip static route bfd