s*****g
发帖数: 1055 | 1 Can anyone shed some light on how IP FRR failure detection works? I don't
quite get the "failure detection" section described in:
"IP Fast Reroute Framework
draft-ietf-rtgwg-ipfrr-framework-13"
The 3 methods listed there are only applicable to link failures, how does IP
-FRR detect node failure? | z**r
发帖数: 17771 | 2 my understanding is both link protection and node protection use the same
methods to detect failure, say BFD.
link protection creates a next hop (NHOP) backup tunnel, and node proection
creates a next-next hop (NNHOP) backup tunnel, which means the MP is the
router behind the protected router.
IP
【在 s*****g 的大作中提到】
: Can anyone shed some light on how IP FRR failure detection works? I don't
: quite get the "failure detection" section described in:
: "IP Fast Reroute Framework
: draft-ietf-rtgwg-ipfrr-framework-13"
: The 3 methods listed there are only applicable to link failures, how does IP
: -FRR detect node failure?
| s*****g
发帖数: 1055 | 3 BFD detects a next next hop link failure? how? what's BFD's application
protocol in this case?
MPLS can use RSVP PATH error message to notify upstream (PLR) to create a
repair session when failure happens in next next hop, but IP does not have
similar mechanism. | z**r
发帖数: 17771 | 4 RFC 5883? BFD triggered FRR isn't new to MPLS FRR, but for IP FRR triggered
by BFD, I don't know, but it's described in the RFC 5714 section 5.2.3 "
Methods for link/node failure determination may be based on techniques such
as BFD", so there should be some kind of implementations in IP FRR? at least
, it's a good match to MPLS FRR to me :)
【在 s*****g 的大作中提到】
: BFD detects a next next hop link failure? how? what's BFD's application
: protocol in this case?
: MPLS can use RSVP PATH error message to notify upstream (PLR) to create a
: repair session when failure happens in next next hop, but IP does not have
: similar mechanism.
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