From: John Jones (acer0001@gmail.com)
Date: Wed Feb 28 2007 - 00:51:02 ART
What about enabling jumbo frames? I am not familiar with the DOiT labs, but
this may help the situation. I am not a pro, but just an idea...
John
On 2/27/07, Michael Zuo <mzuo@ixiacom.com> wrote:
>
> Ahhh, I found out that the "ip mtu 1500" is not a typo. The solution is
> setting the system mtu to 1504 also but selectively setting mtu for some
> vlans back to 1500.
>
> But I still have the 2nd question: is there any ill effect having the
> mtu 4 bytes too big (of course, assuming OSPF adjacency will be taken
> care of with "mtu-ignore")
>
> thanks
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Michael Zuo
> Sent: Tuesday, February 27, 2007 6:02 PM
> To: ccielab@groupstudy.com
> Subject: system mtu setting for DOiT lab 4
>
> hi group,
>
> i ran into an issue doing DOiT lab 4. this lab requires configuration of
> dot1q tunnel on switch ports and the solution mentioned that i should
> configure "ip mtu 1500" on the vlan SVI interfaces. however, from the
> DocCD section on dot1q tunnel, Cisco is recommending setting system mtu
> to 1504 because of the 4 extra bytes used by dot1q tunnel.
>
> anyone knows if the DOiT lab solution has a typo?
>
> also, in a lab test environment, is there any negative effects of
> setting global "system mtu" instead of per interface "ip mtu"?
>
> thanks a lot
>
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