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From: Nivedita Singhvi <niv@us.ibm.com>
To: Andi Kleen <ak@suse.de>
Cc: "Kevin W. Rudd" <ruddk@us.ibm.com>,
	davem@redhat.com, kuznet@ms2.inr.ac.ru, netdev@oss.sgi.com,
	chester.f.johnson@intel.com
Subject: Re: PMTU issues due to TOS field manipulation (for DSCP)
Date: Wed, 10 Dec 2003 12:30:39 -0800	[thread overview]
Message-ID: <3FD7826F.1050308@us.ibm.com> (raw)
In-Reply-To: <20031210203433.3747b7fd.ak@suse.de>

Andi Kleen wrote:

> I don't think the network users will be very happy if you require changing all
> end hosts this way. How about the following hack? For DF=1 packets
> the ipid field is useless. When you rewrite the TOS to DSCP save
> the old TOS in the ipid field.  When you see an ICMP fragment required
> message with the right DSCP on the router restore the old TOS from the ipid 
> field.

Wouldnt this require changes at the both ends, router and
host? How would we sync?

thanks,
Nivedita

  parent reply	other threads:[~2003-12-10 20:30 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-12-10 18:23 PMTU issues due to TOS field manipulation (for DSCP) Kevin W. Rudd
2003-12-10 19:34 ` Andi Kleen
2003-12-10 20:20   ` Julian Anastasov
2003-12-10 20:33     ` Nivedita Singhvi
2003-12-10 21:18       ` Julian Anastasov
2003-12-10 22:36         ` Nivedita Singhvi
2003-12-10 22:51           ` David S. Miller
2003-12-10 23:15             ` Julian Anastasov
2003-12-10 23:20               ` David S. Miller
2003-12-11  0:06                 ` Julian Anastasov
2003-12-11  0:09                   ` David S. Miller
2003-12-11  0:34                     ` Julian Anastasov
2003-12-12  8:31                       ` David S. Miller
2003-12-12 23:38                         ` Julian Anastasov
2003-12-18 23:17                           ` Kevin W. Rudd
2004-01-19 22:43                           ` Kevin W. Rudd
2004-01-20  4:29                             ` David S. Miller
2003-12-13  0:10                         ` Julian Anastasov
2004-03-04  9:36                           ` David S. Miller
2004-03-04 20:56                             ` Julian Anastasov
2004-03-04 22:02                               ` kuznet
2004-03-06 11:55                                 ` Julian Anastasov
2004-03-06 16:02                                 ` Julian Anastasov
2003-12-10 20:26   ` Kevin W. Rudd
2003-12-10 20:52     ` Andi Kleen
2003-12-10 20:30   ` Nivedita Singhvi [this message]
2003-12-10 20:55     ` Andi Kleen
2003-12-10 21:11       ` Nivedita Singhvi
  -- strict thread matches above, loose matches on Subject: below --
2003-12-10 21:35 Johnson, Chester F
2003-12-10 23:36 Johnson, Chester F
2003-12-11  0:17 ` Julian Anastasov

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