We installed a CISCO 6509e with 2 Sup 720 blades in one building that is about 600m from our corporate HQs. We have a CISC 4507 with 2 Sup 6-E with 10G. We have them connected with fiber using 10g gbic LMR optics in the 10g ports of the sup blades. The link comes up. We moved it to a trunk and set up port channeling. The link will come up as a trunk but the port channel is not coming up. We are at a bit of a loss, we have several closets through the 2 buildings and we utilize port channeling on all of our switches. Below are the interfaces for the 2 interfaces and port channels, we had hoped to add more interfaces to this port channel but we are on hold until we can determine the reason for the port channel not coming up.
6509E
!
interface Port-channel4
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface TenGigabitEthernet5/4
description B2B 10G
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 4 mode auto
GigabitEthernet5/3 unassigned YES manual down down
TenGigabitEthernet5/4 unassigned YES unset up up
Port-channel4 unassigned YES unset down down
4507
interface Port-channel8
switchport
switchport mode trunk
interface TenGigabitEthernet1/1
description CORE-TO-CORE
switchport mode trunk
channel-group 8 mode desirable
TenGigabitEthernet1/1 unassigned YES unset up up
Port-channel8 unassigned YES unset down down
