From: ccie2be (ccie2be@nyc.rr.com)
Date: Wed Oct 01 2003 - 19:30:07 GMT-3
Hi,
2 3550's are connected back to back via Fa0/23 and 0/24 ports on both Cat's.
The requirement is this:
Config the 2 interfaces (Fa0/23 and Fa0/24) connecting the 3550's to appear as
1 link to STP....
This link should allow all vlan's to travel across with their vlan ID intact.
You can not use Cisco's proprietary protocol to achieve this. Every packet
that traverses the link must have the vlan ID, no exceptions.
I'm OK with everything except the last 2 words, "no exceptions". Since we
can't use ISL, 802.1q has to be used, but that means packets in the native
vlan aren't tagged and thus don't have a vlan ID. The solution is below, but
I'm hoping someone can explain how that solution meets the above requirement
and maybe what would be a good way to think through this problem.
Thanks, dt
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