C4506 QinQ support

[Difan Zhao]

Hi experts,

My company has a 4506 core and I want to configure QinQ to bridge a demo network in two buildings. At one end I have a 3750 and it supports all the commands. However the 4506 doesn't seem to support it. The following is the show ver of the 4506.

#sh ver

Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500-ENTSERVICESK9-M), Version 12.2(25)SG1, RELEASE SOFTWARE (fc2)

Technical Support: http://www.cisco.com/techsupport

...

ROM: 12.2(31r)SGA1

...

System image file is "bootflash:cat4500-entservicesk9-mz.122-25.SG1.bin"

...

cisco WS-C4506 (MPC8245) processor (revision 7) with 524288K bytes of memory.

Processor board ID FOX085003JK

MPC8245 CPU at 333Mhz, Supervisor IV

...

Can I get the feature by simply updating the firmware to a newer version? If yes what firmware should I go to? This is the core switch of the company so I don't want to put on the wrong firmware and then downgrade it again... Do I need to use a different feature set?

Thanks!

[Derek Zhang]

Please refer to http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/25ew/configuration/guide/tunnel.html

A supervisor higher than SUP V can support QinQ, but may not support on SUP IV

[Difan Zhao]

Thank you for the quick reply! I'm reading the doc and I see this:

Note

802.1Q requires Supervisor Engine V; Layer 2 protocol tunneling is supported on all supervisor engines.

I guess it's typo since 802.1q is just normal vlan tagging and should be supported even on the lowest switch model. I think it means QinQ rather than 802.1q. Do you know since which IOS release is the QinQ being supported? I just want to know if it's worth a try to update the firmware or not.

Thanks!