FWSM - Sharing Interface Vlans

Answered Question
Feb 8th, 2010
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Hi guys,

I am trying to share two vlans in two different contexts but when I try to add the same vlan in the second context I receive this message: “Interface Vlan15 cannot be allocated to context. Interface is allocated to another context in a different failover group”. I have seen same example where you can share the same vlans; so I don’t know where is my fail.

http://www.cisco.com/en/US/docs/security/fwsm/fwsm31/configuration/guide/exampl_f.html#wp1029314

thanks.

Correct Answer by Kureli Sankar about 7 years 5 months ago

Correct.

Move both failover groups to one blade so, they both show active on one blade.

Now, move the context A(previous one) to a diff. failover group. Now, you can add the vlan to context B which will also be in the same failover group.


-KS

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Kureli Sankar Mon, 02/08/2010 - 10:00
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  • Cisco Employee,

I believe you are using active/active failover.

If that is the case then the context that you are creating should also belong in the same failover group as you are trying to share a vlan between contexts that is in a diff. failover group.


Both contexts that share a vlan should belong in the same failover group. I believe that is the problem.


-KS

Oscar Cardiel Mon, 02/08/2010 - 10:18
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Thanks for your answer, Kusankar.

You are right; the contexts are in different failover group. Is it not possible to share the same interface vlan then?

Regards

Correct Answer
Kureli Sankar Mon, 02/08/2010 - 10:35
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  • Cisco Employee,

Correct.

Move both failover groups to one blade so, they both show active on one blade.

Now, move the context A(previous one) to a diff. failover group. Now, you can add the vlan to context B which will also be in the same failover group.


-KS

Oscar Cardiel Mon, 02/08/2010 - 10:48
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Yes it is, you are right again, fantastic!.

Thank you very much for your help, I really appreciate that.

Regards

Oscar

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