From: Dave Schulz (dschulz@skyline-ats.com)
Date: Sat May 19 2007 - 13:10:39 ART
John -
If you use root guard on the SP-facing port, and your provider provides a
better root in the spanning-tree calculation, then there may be an issue.
You may want to check with your provider.
As per the docCD....
If spanning-tree calculations cause an interface in the customer network to
be selected as the root port, root guard then places the interface in the
root-inconsistent (blocked) state to prevent the customer's switch from
becoming the root switch or being in the path to the root.
HTH,
Dave Schulz
dschulz@skyline-ats.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of John
Gibson
Sent: Saturday, May 19, 2007 10:00 AM
To: ccielab@groupstudy.com
Subject: Root guard only guards 1 vlan or all vlans ?
I know I can do a simple experiment, but I just wonder
if there is some insight story.
When we make a root guard so that our service provider
doesn't take over root of our local VLANs (in case
provider has the same vlan IDs), when the service
provider does attempt to take over root of our local
VLANs , will our guarding ports block all vlans or
just those vlans in conflict ?
I have a very bad service provider. But my local
manager insists this is the best service provider we
can get.
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