netdev
[Top] [All Lists]
<prev [Date] next>
[Advanced]
 <prev [Thread] next>

Re: PMTU issues due to TOS field manipulation (for DSCP)

from [Nivedita Singhvi] [Permanent Link][Original]
To: Andi Kleen <ak@xxxxxxx>
Subject: Re: PMTU issues due to TOS field manipulation (for DSCP)
From: Nivedita Singhvi <niv@xxxxxxxxxx>
Date: Wed, 10 Dec 2003 12:30:39 -0800
Cc: "Kevin W. Rudd" <ruddk@xxxxxxxxxx>, davem@xxxxxxxxxx, kuznet@xxxxxxxxxxxxx, netdev@xxxxxxxxxxx, chester.f.johnson@xxxxxxxxx
In-reply-to: <20031210203433.3747b7fd.ak@suse.de>
References: <Pine.LNX.4.44.0312101020480.21684-100000@w-kevinr.svc.beaverton.ibm.com> <20031210203433.3747b7fd.ak@suse.de>
Sender: netdev-bounce@xxxxxxxxxxx
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.2.1) Gecko/20021130 
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




[More with this subject...]
<Prev in Thread] Current Thread [Next in Thread>
Previous by Date:  Re: PMTU issues due to TOS field manipulation (for DSCP), Kevin W. Rudd
Next by Date:  Re: PMTU issues due to TOS field manipulation (for DSCP), Nivedita Singhvi
Previous by Thread:  Re: PMTU issues due to TOS field manipulation (for DSCP), Andi Kleen
Next by Thread:  Re: PMTU issues due to TOS field manipulation (for DSCP), Andi Kleen
Indexes:  [Date] [Thread] [Top] [All Lists]