[c-nsp] mpls mtu / ip mtu / ospf

[Gerald Krause]

Phil Mayers schrieb:
> Gerald Krause wrote:
>> On one of my systems I need to have a greater Ethernet-MTU for MPLS 
> 
> What equipment? Some kit IIRC cannot set a lower IP MTU e.g. 3550? I 
> could be wrong on that.

It's a 7200VXR/PA-FE-TX.

> Well, at the Cisco end you can:
> 
> int blah
> ip ospf mtu-ignore
> 
> ...but the Cisco may still transmit MTU!=1500 which may fox the other end.

Jep, I've tested this some time ago but it doesn't had the effect I 
was looking for.

>> !
>> interface fastethernet 0
>>   mtu 1530
>>   ip mtu 1500
>>   mpls ip
>> !
> 
> That's what you want - we have this on our 6500s:
> 
> int vlanX
>   mtu 9212
>   ip mtu 9100
>   mpls ip

Ok, so "ip mtu" will influence OSPF but not MPLS? That would be fine 
for me (at the moment).

--
Gerald   (ax/tc)