[j-nsp] Bypass LSP functionality question

[Phil Bedard]

That's not correct.  You should take a look at RFC4090.  A Patherr message
is sent to the head-end node with a flag set to notify it local protection
is in use.  There are also flags in the RESV RRO to notify the head-end
local protection is in use.  The head-end node is smart enough to keep
using the path until it can reserve a new path and do a MBB operation.

Facility bypass wouldn't be very useful if it only protected traffic for a
few ms...:) 

Phil 

On 7/6/11 11:50 AM, "David Ball" <davidtball at gmail.com> wrote:

>  Just looking for confirmation of a suspicion here.
>
>  If I have an LSP configured with link-protection on every interface
>along the way (creating many-to-one Bypass LSPs, as opposed to 1:1
>detours), no secondary standby path defined, and a protected interface
>fails, the ingress node will have no ability to perform a
>make-before-break, right?  Because the Path Tear messages will be sent
>both upstream and downstream from the failed interface?  The bypass
>will only help me up until the upstream nodes process the Path Tears
>and a new LSP is signalled from the ingress node....or am I missing
>something?
>
>  More familiar with detours, so just checking myself wrt bypasses....
>
>Cheers,
>
>David
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