cluster config issue on switch !!!!

Unanswered Question
Feb 16th, 2009
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hi all,

i have one confusion related to call manager failover..i have one call manger 6.0 cluster at one of my customer. publisher ip is and subscriber ip is both are connected on one switch and dhcp is configured for issuing ip's for voice and data .. the dhcp config for voice vlan on switch is

ip dhcp pool voice



option 150 ip

according to above config is ip of publisher, which will issue to ip phone via option 150 commnad and there is no configuration of subscriber ...what if publishers goes down, then how phone will look for subscriber whos ip is ...


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lagos Mon, 02/16/2009 - 12:11
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Hello nasry,

To have redundant TFTP service, you will need to run TFTP service on both of your nodes and configure a 2nd IP in the option 150 entry.

Ahmed Nasry Abd... Tue, 02/17/2009 - 02:15
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hi ..

so you mean to say i need to run TFTP service on Publisher as well as on subscriber and in option 150 command i should configure it like

option 150 ip

like this option 150 command should be configure ???


MARTIN STREULE Tue, 02/17/2009 - 07:01
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This only affects new phones that you add to the system when the publisher is down.

Existing phones get the CCMs they can register [CCM Group] and the SRST reference when they get their config from the tftp server.

You can check that directly on the phone:

Settings/Device Configuration/CallManager Configuration

Here you see in real time how the phone switches over.




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