I have a Catalyst 5500 running software version 4.5(10) on SUP 3's.
I need to create an 802.1Q trunk between this switch and a Catalyst 4006. While the code supports 802.1Q, the switch will not allow 802.1Q on the ws-u5533 module and says the feature is not supported.
Is there any way around this issue without adding a fiber module or upgrading the code to version 5?