Hi Steve
A few things to check:
1. You have vlan 200 created on the 3524 (the commands you have in the
diagram will be permitted without the actual vlan existing on the switch)
2. You may need to set the q-in-q outer tag on the 3524 with the
following commands on the Fa0/1 port:
switchport mode dot1q-tunnel
switchport access vlan 200
And just have the 1841 pass single tagged frames to the 3524, allowing
the 3524 to add the extra (outer) q tag. Obviously this is slightly
different to what you are doing now but it's more common - may be what
you actually want to do. Assuming that the 3524 supports dot1q-tunnel -
3550s, 3560s and above all do, can't remember if the 3524 can or not.
3. Don't forget to increase the MTU globally on the 3524 and on the
ME3600 per-port to at least 1504 to account for the extra q tag. You'll
definitely need more than 1500 (the default) to avoid very nasty layer 2
MTU problems. This won't fix the pinging problem but it will cause much
hair loss later on if you don't address it at the time of setup ie now.
4. And lastly, I have run into problems with this sort of thing before
with carriers in between the various devices permitting (or more
specifically, not actually permitting) double tagged frames across their
networks. Not sure if this applies to you or not.
Hope this helps. I've been down this learning curve myself in the last
12 months, once you master it the metro ethernet gear is simply
fantastic at this sort of stuff and you'll wonder how people ever build
customer facing networks without it :-)
Reuben
On 4/09/2012 8:30 PM, Steve McCrory wrote:
Hi list,
I'm having a play about with the EVC features of the ME3600 and I've hit
a problem with Bridge Domain Routing.
I have a CE configured with stacked VLANs connected to the trunk port of
a 3524, with an outer VLAN of 200 and an inner VLAN of 100. The 3524 has
a trunk port connected to an ME3600X. VLAN 200 is defined locally on the
3524 and allowed on both trunk ports.
The corresponding port on the ME3600 has been configured with a service
instance, matching double-tagged frames (200/100). I've popped the two
tags and I'm trying to ping from an SVI on the ME3600 back to the CE
interface but without success. I've followed the Cisco config guide for
enabling bridge domain routing with two tags
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