07-16-2015 02:41 AM
I have a problem to get Spanning-Tree (PVST or RPVST, not single) running between a VDX6740 and a ICX 7750 switch. For testing I made the setup as easy as possible. The two devices are connected directly with one 1 Gbit port, which is trunked/tagged with one vlan (vlan 322). Native Vlan is Vlan 1.
The problem is, that for vlan 322 both switches are sending BPDUs but don’t receive any. They are getting blocked. For Vlan 1 BPDUs are exchanged without problems, no blocking there.
The setup looks like this:
protocol spanning-tree rpvst
vlan 1 priority 8192
vlan 322 priority 8192
interface TenGigabitEthernet 1/0/41
no fabric isl enable
no fabric trunk enable
switchport mode trunk
switchport trunk allowed vlan add 322
no switchport trunk tag native-vlan
no spanning-tree shutdown
vlan 322 name XY by port
tagged ethe 1/1/2
router-interface ve 322
interface ethernet 1/1/2
spanning-tree 802-1w admin-pt2pt-mac
Do you have any idea, why Spanning Tree BPDUs are not received for VLAN 322 on the other side?
I tested the same with „normal“ STP / PVSTP and get exactly the same behavior. Also when i connect a Cisco Access-Layer-Switch to the ICX with the same setup it works fine for all Vlans.
Thanks for your help in advance!
Solved! Go to Solution.
07-16-2015 04:07 AM
You should stop using this community and use YAMMER instead where a broader audience will potentially be able to answer your query .
As for the below I think you must add the "spanning-tree bpdu-mac 0100.0ccc.cccd" command on your VDX interface .