09-18-2009 09:23 AM - edited 03-15-2019 07:48 PM
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
09-18-2009 09:32 AM
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
09-18-2009 09:35 AM
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.
Michael
09-18-2009 09:41 AM
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.
09-18-2009 09:55 AM
Ah...ok, didn't notice that.
Yes, they'll have to separate those into different VLANs.
Michael
09-21-2009 01:24 AM
Maybe this helps:
"Centralized TFTP in a Multiple Cluster Environment"
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/7_0_1/ccmsys/a02tftp.html#wp1074677
Cheers,
Martin
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