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Cell Relay Retreat>MPLS WG Archive>month:2001-Jun> msg00398



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1+1 protection switching

  • From: Shahram Davari <Shahram_Davari@pmc-sierra.com>
  • Date: Thu, 28 Jun 2001 08:35:49 -0700

Hi,

I think it is understood/accepted that a number of packets may be dropped or deliver out of order for a short period of time. The receiver should re-order the packets and/or request retransmission.  

Yours,
-Shahram

> -----Original Message-----
> From: Pour, Mort [mailto:mpour@celoxnetworks.com]
> Sent: Thursday, June 28, 2001 10:57 AM
> To: 'mpls@uu.net'
> Subject: 1+1 protection switching
> 
> 
> 
> I have a question regarding the 1+1 protection switching in MPLS. 
> Draft <draft-ietf-mpls-recovery-frmwrk-02.txt>
> states that the path merge LSR can select the backup path 
> when the primary
> path fails.
> What about the issues of duplicate (or missing) packets on 
> the backup path
> due
> to variations in delay between the two path. Or if the two path are
> synchronized, how is that achieved?
> 
> Thanks
> Mort Pour
>