Message-Id: <200202082059.g18Kxb001091@marajade.sandelman.ottawa.on.ca>
To: Andi Kleen <ak@suse.de>
cc: netdev@oss.sgi.com
Subject: Re: PMTU info 
In-reply-to: Your message of "Fri, 08 Feb 2002 02:12:33 +0100."
             <20020208021233.A27027@wotan.suse.de> 
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Date: Fri, 08 Feb 2002 15:59:37 -0500
From: Michael Richardson <mcr@sandelman.ottawa.on.ca>
Sender: owner-netdev@oss.sgi.com
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>>>>> "Andi" == Andi Kleen <ak@suse.de> writes:
    Andi> On Thu, Feb 07, 2002 at 05:59:45PM -0500, Michael Richardson wrote:
    >> We think that /proc/net/rt_cache might have info, but we don't
    >> see it. Is there another place that we should look?

    Andi> /proc/net/rt_cache has a MTU column. You can also get it via 
    Andi> ip route get <ip address> 

    Andi> route --cache unfortunately doesn't show it. 

  Do they expire very quickly? Can we extend it? Is there some debugging we
can enable to log the MTU changes? Does it get deleted when the TCP
connection gets closed?

  We did see the MTU column, but we never see something to our specific
address. We know that the ICMP is being received, because the packet sizes go 
down.

]       ON HUMILITY: to err is human. To moo, bovine.           |  firewalls  [
]   Michael Richardson, Sandelman Software Works, Ottawa, ON    |net architect[
] mcr@sandelman.ottawa.on.ca http://www.sandelman.ottawa.on.ca/ |device driver[
] panic("Just another NetBSD/notebook using, kernel hacking, security guy");  [


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