opt 150 when you have multiple call manage clusters

Unanswered Question
Sep 18th, 2009

A switch with one voice vlan and a mixed set of users such as IPT users connected to a IPT cluster and call center users connected to a call center cluster. Having an issue trying to deliver opt 150 to them uniquely. dhcp does not seem to have a mac to option mechanism without reserving an ip address. Any help appreciated

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Paolo Bevilacqua Fri, 09/18/2009 - 09:32

Seem to me you ought to split the vlan depending on which CM the phone has to go.

Some cisco switches also support mac-based vlans

htluo Fri, 09/18/2009 - 09:35

This is done by "DHCP scope". On DHCP server, you may define different scopes and each scope would have different options.

In the router, you configure ip-helper. Depending on the different forwarding address, DHCP will choose different scope to offer IP addresses.

This is a very standard configuration.

Hope this help.



Paolo Bevilacqua Fri, 09/18/2009 - 09:41

Michael, the thing is that in a single vlan, there will be a single forwarding address so it won't be possible to distinguish on that basis.

Perhaps there is some other attribute that can be used.

htluo Fri, 09/18/2009 - 09:55

Ah...ok, didn't notice that.

Yes, they'll have to separate those into different VLANs.



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