Subject: Re: [Tsvwg] (no subject)

From: Randall Stewart <[email-masked]>
Date: Tue, 02 Oct 2001 08:16:36 -0500

Hi Vijay:

Vijay Kumar Choudhary wrote:
> 
> Hi all,
>    The following line is written in RFC 2960 , page 61,
> 
>    "If the State Cookie is older than the lifespan carried in the State
> Cookie and the Verification Tags contained in the State Cookie do not match
> the current association's Verification Tags, the packet,including the COOKIE
> ECHO and any DATA chunks, should be  discarded. "
> 
> In the above sentence i didnt understand the line
> "Verification Tags contained in the State Cookie do not match the current
> association's Verification Tags"

This sentence is in the section titled 

"Handling a COOKIE-ECHO when a TCB already exists"

It is reflecting on the fact that you MAY get a COOKIE-ECHO due
to a LOST COOKIE-ACK in the network. So when a duplicate COOKIE arrives
it will have the same VT's that exist in your current TCB. In this
case you DO NOT want to gage the time being bad since you already
accepted the cookie earlier... all you want to do is retransmit
the lost COOKIE-ACK.

Hope that helps :)

R

> 
> Which verification tag is it talking of ??? Is there any verification tag
> field in the state cookie?? Is it talking of Peer Tie Tag and Local Tie
> Tag??
> 
> Regards,
> Vijay
> 
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-- 
Randall R. Stewart
[email-masked] 815-342-5222 (cell phone)

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