[c-nsp] MTU Issue on QinQ Eth link with MPLS

[Masood Ahmad Shah]

Well, better you check current MTU settings using command 

# sh interfaces | inc MTU

And cheers :)

Yes of course you need to adjust routers MTU as well; if you are running
with MPLS or gre 

Regards,
Masood Ahmad Shah


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of mb2 at os.datafx.com.au
Sent: Thursday, January 03, 2008 9:19 AM
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] MTU Issue on QinQ Eth link with MPLS

Quoting Matt Carter <matt at iseek.com.au>:

> Catalyst 2950/2955 Series
>
http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration
> _example09186a008010edab.shtml#c5
>
> You can classify the Catalyst 2950/2955 Series switches into two major
> groups, where one supports baby giants (up to 1530 bytes), but the other
> does not. However, this refers to traffic that flows through the switch.
> Packets destined to the management (VLAN) interface can support only 1500
> bytes.
>
> These models of 2950 switches support only 1500 bytes:
>      WS-C2950-12
>      WS-C2950-24
>      WS-C2950-48
>      WS-C2950C-24
>      WS-C2950T-24
>
> These models of 2950/2955 switches support up to 1530 bytes:
>      WS-C2950G-12-EI
>      WS-C2950G-24-EI
>      WS-C2950G-24-EI-DC
>      WS-C2950G-48
>      WS-C2950G-48-EI
>      All models of 2950 LRE Series switches
>      All models of 2955 Series switches
>

Thanks Matt - Do the models that support baby giants do it natively, or 
must I issue the
"system mtu 1530" in global conf?

Must I also adjust the mtu on the 7200's FE Ints?


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