North American Network Operators Group
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RE: 802.17 RPR and L2 Ethernet interoperablity (Ethernet over RPR)

  • From: Mikael Abrahamsson
  • Date: Wed Jul 07 06:54:17 2004 
On Wed, 7 Jul 2004, Sam Stickland wrote:

> One question about this, the Q-in-Q tunnelling would have to take place on
> the switch connected to the ring - what happens if the packet has already
> been placed in a dot1Q tunnel? I haven't really worked much with dot1Q
> tunneling - are their any know problems with extra tags? (aside from MTU 
> issues, but I imagine most rings will support at least 9bytes)

Most switches will only see the outer tag and will thus be transparent for 
Q-in-Q:ed packets.

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se