03-02-2009 09:02 AM - edited 03-04-2019 03:46 AM
Running IOS 12.2(18)SXD6 on a 6509
Have gigabit ethernet modules 6148, and trying to trunk a port. There is no option to set encapsulation for dot1q. Apparently this is the scenario when only ISL is supported by the module. Is there a workaround/version upgrade so that dot1q is supported by this module?
thanks
03-02-2009 09:14 AM
dot1q should definitely be supported here. Can you post some output of what you are seeing that would lead you to believe otherwise? (config for interface in question, and the output of "switchport trunk encapsulation ? )
-Bobby
03-02-2009 09:19 AM
thanks for your reply
here is the interface config thus far
interface GigabitEthernet9/1
no ip address
switchport
switchport trunk allowed vlan 1-1005
switchport mode trunk
spanning-tree portfast disable
and output for config:
core0.ny-6509(config-if)#switchport trunk ?
allowed Set allowed VLAN characteristics when interface is in trunking mode
native Set trunking native characteristics when interface is in trunking
mode
pruning Set pruning VLAN characteristics when interface is in trunking mode
I read somewhere that there is no encapsulation option when the switch supports only ISL or dot1q. Apparently this one is ISL because the trunking is not working.
03-02-2009 09:27 AM
Ah, apparently spanning tree is required to be enabled. Once we enabled it, it started working. We still don't have the option to specify encap, so dot1q must be the default.
Thanks
03-02-2009 10:43 AM
The actual problem is the opposite of what you originally thought. The WS-X6148-GE-TX card only supports 802.1q trunking.
See:
So that's why you don't see a CLI parameter for encapsulation.
HTH,
Bobby
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