Subject: [BEHAVE] TURN Issue: Preserving bits in the IP header

From: Philip Matthews <[email-masked]>
Date: Fri, 21 Dec 2007 17:15:59 -0500

The thread on exceeding the MTU size has raised another issue about  
TURN: what bits (if any) in the IP header should be preserved across  
a TURN relay?

My proposal is:

   A TURN server MUST preserve the Don't Fragment (DF) and TOS (= ECN  
and DiffServ) bits in the IP header when relaying IPv4 packets.

Comments?

- Philip

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