The MPLS WG Archive

[Shahram Davari <Shahram_Davari@pmc-sierra.com>]

Curtis,

I was more thinking in terms of how to make sure the backup/detour
paths are working fine, while the traffic is still on the working path.


Yours,
-Shahram

> -----Original Message-----
> From: Curtis Villamizar [mailto:curtis@fictitious.org]
> Sent: Thursday, December 12, 2002 11:14 PM
> To: Shahram Davari
> Cc: mpls@UU.NET
> Subject: Re: Last call on LSP Ping 
> 
> 
> 
> In message 
> <4B6D09F3B826D411A67300D0B706EFDEB03B8C@nt-exch-yow.pmc-sierra.bc.ca
> >, Shahram Davari writes:
> > Hi,
> > 
> > Would the authors comment on how the MPLS-ping applies when
> > Fast Reroute scheme exists? In other words how is the backup path
> > and/or detour paths tested from the ingress?
> > 
> > Thanks,
> > -Shahram
> 
> 
> In ping mode you should not know that the backup is in use.
> 
> Perhaps an error return in traceroute mode would be helpful or an
> indication that the next hop is part of a detour.
> 
> Keep in mind that once the detour is put into use it is usually a
> matter of seconds before a new primary is created with its own set of
> detours, none of which are in use.
> 
> Curtis
>