[nsp] MTU >1500 on 2900XL

[Mike Bernico]

I sure have been down this road lately.  

This is a great link for MPLS MTU issues on switches.  Beware the wrap.

http://www.cisco.com/en/US/customer/products/hw/switches/ps700/products_
configuration_example09186a008010edab.shtml

I hope you don't have any cat 4000s with with sup Is or IIs you need to
get mpls through.  You'll be screwed like we are.  

Mike



-----Original Message-----
From: Tomas Daniska [mailto:tomas at tronet.com] 
Sent: Wednesday, September 03, 2003 8:54 AM
To: Ezequiel Carson; jlewis at lewis.org
Cc: cisco-nsp at puck.nether.net
Subject: RE: [nsp] MTU >1500 on 2900XL

by the way

i recall the first ios versions supporting baby giants on 3500XL were
reporting false crc errors for every baby giant


afair it was due to that they've changed asic ucode so that it supported
baby giants but were not able to update the crc routine

--

deejay 

> -----Original Message-----
> From: Ezequiel Carson [mailto:ezequiel at ifxnw.com.ar] 
> Sent: 3. septembra 2003 6:30
> To: jlewis at lewis.org
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [nsp] MTU >1500 on 2900XL
> 
> 
> Hi Jon,
> 	Are you passing MPLS Frames with 2 labels? like VPN's frames?
> 
> Thanks
> Ezequiel.
> 
> On Tue, 2003-09-02 at 22:06, jlewis at lewis.org wrote:
> > On Tue, 2 Sep 2003, Ezequiel Carson wrote:
> > 
> > > Hello,
> > > 	i would like to know if Cisco 29xx (i.e 2924) supports 
> frames bigger
> > > than 1500 bytes. Example, 1508.
> > 
> > AFAIK, only the XL-EN models, and you may need an IOS 
> upgrade.  Then you 
> > can
> > 
> > (config-if)#mtu ?
> >   <1500-2018>  MTU size in bytes
> > 
> > I've got several 2924XL-EN's passing MPLS tagged packets 
> >1500 octets.  
> > c2900xl-c3h2s-mz.120-5.WC5.bin can definitely do it.
> > 
> > 
> ----------------------------------------------------------------------
> >  Jon Lewis *jlewis at lewis.org*|  I route
> >  System Administrator        |  therefore you are
> >  Atlantic Net                |  
> > _________ http://www.lewis.org/~jlewis/pgp for PGP public 
> key_________
> > 
> > _______________________________________________
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> > 
> > 
> 
> 
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