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Cell Relay Retreat>MPLS-OPS Archive>month:2004-Sep> msg00135



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Re: IP Routing problem after enabling MPLS?

  • From: Alok <alokdube@hotpop.com>
  • Date: Mon, 20 Sep 2004 12:40:23 +0530
  • Cc: garry@regio.net, mpls-ops@mplsrc.com
  • Resent-Date: Mon, 20 Sep 2004 03:51:59 -0400
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thats a coool trick! reduce the MTU to accomodate labels..talk about 
progress!!
:))

sthaug@nethelp.no wrote:

>>>use a lower IP MTU in your network (ensuring there is room for at least
>>>two labels, preferably a bit more), or you can use interface types that
>>>      
>>>
>>How does this help me with the packet transfer? Where would I set it 
>>lower in order to fix the problem? Setting it on both sides of the 
>>ethernet bridge didn't help me any (set "ip mtu" to 1488) ... should I 
>>instead set the MTU to 1488 on our uplink/peering interfaces?
>>    
>>
>
>With "ip mtu 1492" on all FE links, including uplink/peering, you know
>that you have room for two labels. You may also be able to increase the
>MPLS MTU ("tag-switching mtu ...") as another poster mentioned.
>
>Steinar Haug, Nethelp consulting, sthaug@nethelp.no
>
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