[nsp] dot1q subints on 6500/sup720

[Simon Lockhart]

Dear Collective Wisdom,

We're just planning our migration from 7200/GSR to 6509/Sup720, and one area
that may be an issue for us is dot1q subints. We have a number of ports
which go off to carriers who deliver private interconnects on different
VLANs. Currently we terminate these on a 7200, and nicely create subints
for each VLAN.

Now, as we migrate to the 6500, I see that we can still create subints, but
it won't let us use the same VLAN id on two different physical interfaces.
This makes sense, as it's just using one VLAN table for the whole switch.

However, what's the best way to remove this restriction? Is the GE-WAN the
only answer? What about for 100M ports?

Thanks,

Simon
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