Here is what we do... router isis xxxx interface TenGigabitEthernet0/0/0/0 circuit-type level-2-only bfd minimum-interval 50 bfd multiplier 5 bfd fast-detect ipv4
We keep the same config for local and long haul core links. Works like a champ every time. Also as a FYI if you are running ASR9K, you are able to offload the BFD process from the Linecard CPU to the NPU. This allows BFD timers down to 3.3 milliseconds. https://www.cisco.com/c/en/us/td/docs/routers/asr9000/software/asr9k_r5-1/routing/configuration/guide/b_routing_cg51xasr9k/b_routing_cg51xasr9k_chapter_011.html -----Original Message----- From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Mark Tinka Sent: Saturday, May 5, 2018 6:38 PM To: James Bensley <jwbens...@gmail.com>; NANOG <nanog@nanog.org> Subject: Re: How are you configuring BFD timers? On 22/Mar/18 10:47, James Bensley wrote: > Have you looked at testing and adding this command to your IOS devices: > > ip routing protocol purge interface In all recent versions of IOS, this command is now standard and is elided from the running configuration. Mark. ________________________________ CONFIDENTIALITY NOTICE: This e-mail transmission, and any documents, files or previous e-mail messages attached to it may contain confidential information that is legally privileged. If you are not the intended recipient, or a person responsible for delivering it to the intended recipient, you are hereby notified that any disclosure, copying, distribution or use of any of the information contained in or attached to this transmission is STRICTLY PROHIBITED. If you have received this transmission in error please notify the sender immediately by replying to this e-mail. You must destroy the original transmission and its attachments without reading or saving in any manner. Thank you.
