[c-nsp] Jumbo frames and 3750

[Tassos Chatzithomaoglou]

I had exactly the same problem. Check the "system mtu routing <x>" command...

-- 
Tassos

Raniery Pontes wrote on 15/8/2006 9:37 ??:
>   Hi everybody,
> 
>   we´ve got a customer with a 3750  (IOS Version 12.2(25)SE) running a 
> pretty simple configuration. There are 2 routed vlans: a default vlan 
> and a "upstream" vlan, which goes to upstream provider (our company). 
> The 3750 has only a default static route pointing upstream.
> 
> We´re an R&E network and we´ve got jumbo-frames enabled on our network.
> This customer has enabled jumbo-frame on the 3750 ("system mtu jumbo
> 9000" command).
> 
> When I send jumbo-frames to an end station connected to the upstream
> vlan (I mean, 3750 doesn´t need to route between vlans), everything
> works fine. But when I try to send jumbo-frames to a station in the
> default vlan, it fails.
> 
> I´ve tried to change "ip mtu" in both vlans, but the maximum allowed
> value is 1500 bytes.
> 
> Does the 3750 only "switch" jumbo frames? Don´t they route jumbo-frames
> (or should I say jumbograms) ?
> 
> I´ve checked Cisco documentation, but I haven´t found anything regarding
> this issue.
> 
> Thanks in advance
> 
> Raniery
> 
> 
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