[c-nsp] Determining which ports have another switch attached?

[Matlock, Kenneth L]

'sho spanning-tree vlan <VLAN_ID> detail | inc BPDU|Port'

Look for ports with BPDU received > 0

A switch coming up will probably send at least 1 BPDU before determining
it's not the root.

This of course, is assuming the switch at the other end actually talks
STP :)

Ken Matlock
Network Analyst
Exempla Healthcare
(303) 467-4671
matlockk at exempla.org


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Peter Pauly
Sent: Thursday, July 21, 2011 7:37 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Determining which ports have another switch attached?

Is there an easy way to determine which swtich ports have another
switch attached to them (assume non-CDP supporting) before enabling
bpduguard?
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