From: ccie2be (ccie2be@nyc.rr.com)
Date: Sat May 21 2005 - 18:01:24 GMT-3
Think of it like this:
R1-----------bridgesw1=======router6
R5-----------bridgesw1
where ===== is a trunk carrying the vlan traffic from both R1 and R5 which
are both in the same ip subnet.
And, on R6, the 2 sub-int's fa0/x are BRIDGED together.
When you configure this, you can try some of these variations:
ISL vs 802.1q
Make different devices the root bridge and then try diff commands
show span
show bridge 1
debug bridge bpdu
debug vlan [options]
on both the 3550 and R6.
HTH, Tim
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
gladston@br.ibm.com
Sent: Saturday, May 21, 2005 4:23 PM
To: ccielab@groupstudy.com
Subject: Re: RE: Bridging on isl trunks
Simon,
Could you post the IOS and platform you are using, so we can try to
reproduce it?
Trying to make a model:
R1-----------bridgesw1-----bridger6
R5-----------bridgesw1-------|
There is no loop here, so I can not see STP having a role on this problem.
No matter where the Root is, all ports will be forwarding. But a bug would
not surprise.
Do you have a Sniffer to check where packets stop?
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