802.1Q tunnels

canuck

Hi,

I was just reading this:

http://ham.kiev.ua/3550/en/US/products/hw/switches/ps646/products_configuration_guide_chapter09186a0080115937.html#xtocid6

I understand that when configuring dot1q tunneling, we are supposed to increase the system mtu by four bytes. I was wondering it we must do this on ALL the switches in the topology that are communicating with each other, or only on the switches that have dot1q tunnels configured on their interfaces. In other words, if the system mtu is increased on one switch, is it necessary to increase it on all of them?

Thanks!

nedsky

Hi canuck,

I asked myself the same question and here is Scott's reply: http://ieoc.com/forums/t/8162.aspx

From my point of view if it is for the lab only, I believe it is enough to just enable them on the affected switches.  But if you are on a production networ where VLANS get re-routed over different switches in case of failure, it is best to enable them on all switches.

Cheers.

canuck

Thanks Nedsky, and Scott!!