[c-nsp] mtu issues on 3750

[Tassos Chatzithomaoglou]

There is no support for such (mtu per interface) configuration....

--
Tassos

Marko Milivojevic wrote on 19/4/2006 16:02:

> 
> Have you tried configuring IP MTU on SVI/L3 interface?
> 
> Tassos Chatzithomaoglou wrote:
> 
>> 3750 switches are said to support mtu > 1500 (1500-9000) on all GE 
>> ports according to this:
>>
>> http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_example09186a008010edab.shtml#c3 
>>
>>
>> 3750#sh system mtu
>>
>> System MTU size is 1500 bytes
>> System Jumbo MTU size is 1600 bytes
>>
>> Routed port
>> -----------
>> 3750#sh int g1/0/10
>> GigabitEthernet1/0/10 is up, line protocol is up (connected)
>>    MTU 1600 bytes, BW 1000000 Kbit, DLY 10 usec,
>>
>> 3750#sh ip int gi1/0/10
>> GigabitEthernet1/0/10 is up, line protocol is up
>>    MTU is 1500 bytes
>>
>> SVI
>> ---
>> 3750#sh int g1/0/10
>> GigabitEthernet1/0/10 is up, line protocol is up (connected)
>>    MTU 1600 bytes, BW 1000000 Kbit, DLY 10 usec,
>>
>> 3750#sh ip int vlan 99
>> Vlan99 is up, line protocol is up
>>    MTU is 1500 bytes
>>
>>
>> So you can't have L3 mtu > 1546 (= system mtu) if the GE ports are 
>> configured as L3 (Routed/SVI) ports. Any idea how to overcome this?
>>
>> -- 
>> Tassos
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>