BFD (for BGP) question

General questions
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1

Hi !

I’ve configured not agressive timers 1000/1000/5 ( like MSK-IX suggests)
But 'sh ip bgp neighbors … ’ shows that timers is 300/300/3 ?

What timers are used for BGP process 300/300/3 or 1000/1000/5 ?

BFD Peer:
peer xxx.xxx.xxx.xxx vrf default interface eth0.xxxx
ID: 4190814999
Remote ID: 17
Status: up
Uptime: 9 hour(s), 31 minute(s), 56 second(s)
Diagnostics: ok
Remote diagnostics: ok
Peer Type: configured
Local timers:
Detect-multiplier: 5
Receive interval: 1000ms
Transmission interval: 1000ms
Echo transmission interval: 50ms
Remote timers:
Detect-multiplier: 5
Receive interval: 1000ms
Transmission interval: 1000ms
Echo transmission interval: 0ms

sh ip bgp neighbors xxx.xxx.xxx.xxx

BFD: Type: single hop
Detect Multiplier: 3, Min Rx interval: 300, Min Tx interval: 300
Status: Up, Last update: xxxx:xxxx:32:45

2

Hi @lexxa77 , the BFD output is correct.
It a bug in FRR with output for bgp neighbor.

“the issue is: the daemons that are using BFD does not have a way to get notified about timer value changes, so they always display whatever was configured or the defaults”

Link bfd-issue

3

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