I know this is a Cisco forum, but I figured I'd ask nonetheless. I have a connection problem with two VDX 6710 connect to two Cisco 6506 via a portchannel. The connection is as such Cisco Core A --> VDX A Cisco Core B --> VDX B. In regards to spanning-tree the Cisco Core A is the root switch. Also, the Cisco are the layer 3 of the vlans and their portchannels are configured as such
switchport mode trunk
switchport trunk encapsulation dot1q
On the VDXs the interfaces of the portchannel are set as such
fabric isl enable
fabric trunk enable
channel-group 25 mode active type standard
lacp timeout long
The VDX portchannel itself is configured as such
vlag ignore-split
switchport
switchport mode trunk
no switchport trunk tag native-vlan
The issue I have is that accessing the hosts behind the VDX is intermittent. For instance, I can access a host from 1000-1020 but not from 1021-1041. I havent identified a pattern in them being reachable and not reachable. Any ideas on what may be causing this behavior?
