[c-nsp] Connecting Cisco switch with Extreme

[Edoardo Martelli]

Hi

> We are trying to connect Cisco Catalyst switch (3560) with extreme black
> diamond but its not communicating with each other. We are using trunking (
> 802.1q). Does anybody know of any issue related to this scenario?


We had a 6500 connected to an Extreme summit-400-48t. We also had
problem with trunks, and to make them working we had to
enable the spanning-tree bpdufilter and bpduguard on the catalyst:

interface Port-channel1
 no ip address
 switchport
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 1,10-20
 switchport mode trunk
 spanning-tree bpdufilter enable
 spanning-tree bpduguard enable

cheers
Edoardo