ISL and 802.1q support on new IOS

Unanswered Question
Jan 3rd, 2008

does anyone perhaps know if ISL and 802.1q are supported in IOS s72033-adventerprisek9_wan-mz.122-18.SXF10a or where I can search for verification

I have this problem too.
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ankbhasi Thu, 01/03/2008 - 08:54

Hi Johan,

It supports 802.1q for sure.

Now ISL is supported or not it is also hardware dependent. Some modules will support ISL and some may not.

HTH

Ankur

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ankbhasi Thu, 01/03/2008 - 09:02

Hi Johane,

I understand this image is for Cat6500 switches but what I mean to say is that there are certain line cards/modules which is inserted in cat6509 chassis may not support ISL.

HTH

Ankur

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JMC Nel Thu, 01/03/2008 - 09:05

understand. here is what we have in our 6509

cat6509> (enable) sh module

Mod Slot Ports Module-Type Model Sub Status

--- ---- ----- ------------------------- ------------------- --- --------

1 1 24 1000BaseX Ethernet WS-X6724-SFP yes ok

2 2 48 10/100BaseTX Ethernet WS-X6148-45AF yes ok

3 3 48 10/100/1000BaseT Ethernet WS-X6548-GE-TX yes ok

5 5 2 1000BaseX Supervisor WS-SUP720-BASE yes ok

15 5 1 Multilayer Switch Feature WS-SUP720 no ok

6 6 2 1000BaseX Supervisor WS-SUP720-BASE yes standby

16 6 1 Multilayer Switch Feature WS-SUP720 no standby

7 7 8 Network Analysis Module WS-SVC-NAM-2 no ok

8 8 8 Intrusion Detection Mod WS-SVC-IDSM-2 yes ok

9 9 6 Firewall Module WS-SVC-FWM-1 no ok

we are migrating from hybrid to native this weekend and we selected the IOS but want to make sure that the IOS we select will support both ISL and 801.q

Thanks for your time

ankbhasi Thu, 01/03/2008 - 09:18

Hi Johan,

Great that you posted the "sh mod" from your switch.

For example "WS-X6548-GE-TX" module which is installed on slot 3 will not support ISL trunking from release 12.2(17b)SXA and above so the one you are upgrading is 12.2(18) this means after upgrade this module will only support 802.1q

Same lies true for the line card WS-X6148-45AF.

I will recommend you to have a look at the release note and serach for the keyword ISL and it will update you which line cards will support ISL.

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/122sx/ol_4164.htm

802.1q will be supported by all releases and on all line cards.

HTH

Ankur

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