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Cell Relay Retreat>MPLS WG Archive>month:2001-Jun> msg00397



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1+1 protection switching

  • From: "Pour, Mort" <mpour@celoxnetworks.com>
  • Date: Thu, 28 Jun 2001 10:38:46 -0500

Thanks,
But this may also cause the connection to be dropped by TCP?

Regards,
Mort


-----Original Message-----
From: Shahram Davari [mailto:Shahram_Davari@pmc-sierra.com]
Sent: Thursday, June 28, 2001 10:36 AM
To: 'Pour, Mort'; 'mpls@uu.net'
Subject: RE: 1+1 protection switching


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
>