[c-nsp] ip mtu - omitted on 3750

[Aivars]

We have had the same problem and even opened a TAC case for that. The
answer was that ip mtu was an unsupported command and it was not
supported in hardware. The suggestions were to use ip mtu ignore for
ospf on other devices in ospf domain or "system mtu jumbo". Jumbo does
not rise not rise ip mtu but affects only gigabit interfaces. None of
the suggested compleatly solves the issue and the case is still open.

Aivars

Friday, August 12, 2005, 4:30:02 PM, you wrote:

EA> Hi,

EA> in our Metro-Ethernet network we have a couple of 3750´s
EA> installed (9 stack groups) and noticed that from release
EA> 12.2(25)SE to 12.2(25)SEA Cisco has omitted the "ip mtu xxxx"
EA> command. This is especially painful for us, since the
EA> disappearance of this command heavily influences VLAN, MPLS and
EA> other functionality (basically everything that adds something to a
EA> frame)- while at the same time making supporting a common ip mtu
EA> of 1500 bytes in the network "difficult". 

EA> I just wonder if any of you ran into the same issue. At this
EA> time I am more interested in the fact, whether this is an issue
EA> for anyone else, than in a technical discussion or a solution
EA> (some are available - but they are somewhat expensive, money- or
EA> timewise) - I will gladly follow up with everyone who has the
EA> above issue and/or wants to have more technical details.

EA> best regards

EA> Ernest

EA> EUnet Telekom GmbH                                   CTO
EA> Nussdorfer Lände 23         A-1190 Wien, Vienna, Austria  
EA> http://www.eunet.at  <mailto:ernest.altbart at eunet.co.at>  
EA> see Disclaimer:            http://www.eunet.at/signatur/ 

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