[mpls] Re: [MPLS-OPS]: PATH message lost

["shilpa goel" <shilpa07 at gmail.com>]

The concept of "refresh-timeout" is given  in RFC 2205 section 2.3 Soft State that mentions about the "cleanup-timeout" and "refresh-timeout" periods.

regards,
Shilpa

On 4/25/07, alaerte.vidali at nsn.com <alaerte.vidali at nsn.com > wrote:

Hi,

 

Do you have idea of timers involved?

 

tks,

Alaerte

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From: owner-mpls at UU.NET [mailto:owner-mpls at UU.NET] On Behalf Of ext shilpa goel
Sent: Wednesday, April 25, 2007 1:45 AM
To: mpls-ops at mplsrc.com; mpls at UU.NET
Subject: [MPLS-OPS]: PATH message lost

Ramzi,
 
If a PATH mesg is lost while being transmitted to the destination, it will again be transmitted to the node at which the lost occurred after the REFRESH time period.

In all the nodes upstream to it, the PSBs have been formed and they maintain a REFRESH timer state.

Now until these upstream nodes receive any PATH TEAR message, their PSBs will not be deleted.

Thus when their REFRESH timer expires, they will trigger the generation of PATH REFRESH mesgs, which would appear as a NEW PATH mesg for that downstream node for which the PATH mesg was lost since it had no prior PSB maintained for it.

regards,
Shilpa

On 4/25/07, Ramzi Tka <ramzi.tka at gmail.com > wrote:

Hi all,
what happens when a PATH message is lost while being transmitted to the destination.
a new PATH is resent? A failure is reported and that's all? is there any timer used to notice the lost message? is it the same refresh timer?
Could some please, give some clarification?
Thanks in advance
Ramzi

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