From: boby2kusa (boby2kusa@hotmail.com)
Date: Wed Feb 16 2005 - 15:40:50 GMT-3
First, you are making this much more complicated than necessary. The Dot1q
Tunneling is terminated at the Service Provider meaning all the extra
headers that the tunneling adds is removed before being sent to you.
Second, if you are actually doing the tunneling on your switch the
documantation on dot1q on any platform that supports dot1q tunneling does
not mention tweaking the vlan mtu, only the system mtu. third, in most
cases the system mtu does not even have to be tweaked.
----- Original Message -----
From: "ccie2be" <ccie2be@nyc.rr.com>
To: "Group Study" <ccielab@groupstudy.com>
Sent: Wednesday, February 16, 2005 10:16 AM
Subject: Changing system mtu vs vlan mtu
> Hi guys,
>
> If the system mtu is left at it's default value of 1500, but a vlan's mtu
> is
> set to 1504 to support 801.1Q tunneling, will that work as well?
>
> Or, does the system's mtu have to be changed to 1504?
>
> Assume the access vlan on the Service Provider's switch which is used for
> tunneling is the vlan whose mtu is changed.
>
> Also, I know that for the system mtu change to take effect, the switch
has
> to
> be reloaded. Is the same true when the vlan mtu is changed?
>
> TIA, Tim
>
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