SD-WAN BFD timeout

[Steytler]

hi everyone - 

I'm in the way of being voluntold to learn SD-WAN and am looking for some info that cannot be found in the docs or RFC. Talk about having to weed through documentation!  HOLY COW BATMAN!

BFD is used to determine tunnel liveliness and the poll interval can be adjusted.  Okay, SSDD kind of info I get it.  What I cannot find is a BFD timeout as a default or otherwise. Meaning, what is the BFD timeout value on SD-WAN's IPSec tunnels vs TLS?  

vSmart has a graceful restart of 42300 sec [12 hours] but that certainly is NOT the timeout value for all things BFD in SD-WAN.

Thanks!

[svemulap@cisco.com · Accepted solution]

Hi Steytler -

Please see: https://www.cisco.com/c/en/us/td/docs/solutions/CVD/SDWAN/cisco-sdwan-design-guide.html?dtid=osscdc000283#BidirectionalForwardingDetectionBFD for the default BFD timers.

This is a SD-WAN design link document, which covers all aspects of the SD-WAN solution.

HTH.

[Steytler]

Thank you so much.  I've been weeding through mounds of design guides and config doc's spanning 3-4 releases.  There's just too much documentation.  I was actually looking at this doc but not looking in the Data plane. I was expecting it to be in the control or management plane section.

Many many thanks!