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[Cisco FAQ] - If I’m re-IPing the DNCS, what changes need to be made on the USRM?

What is the procedure to re-IP the USRM?

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New Member

If I’m re-IPing the DNCS, what changes need to be made on the

SOFTWARE VERSION: All USRM software releases.

If you’re just changing the IP address of the dncsatm host on the DNCS you only have to

change 2 things on the USRM:

1. The "dncsatm" host entry in /etc/hosts has be modified to reflect the new IP address of

the dncsatm interface on the DNCS.

2. The /opt/usrm/ConfigFiles/SnmpAgent.txt file must be modified if the USRM is to run in

"supervised" mode, meaning that the DNCS will provision the USRM via SNMP.

However, if you change the IP address of eth0 on the USRM, the update_persistdata script

should be used to update the “creator IP” field embedded in all of the persistdata files

on the USRM to contain the new IP address of eth0 on the USRM. So, to change the IP

address of eth0 on the USRM, you will need to:

1. Edit IPADDR, NETMASK and GATEWAY fields in the

/etc/sysconfig/network-scripts/ifcfg-eth0 file.

2. Modify the Primary USRM’s persistdata files with the update_persistdata tool and the

new IP address of eth0.

3. If you also change the IP address of eth1 on the USRM, you just need to edit the IPADDR

and NETMASK fields in the /etc/sysconfig/network-scripts/ifcfg-eth1. The IP address of

eth1 is not the “creator IP”, the IP address of eth0 is.

4. If you change the IP address of eth0 on the USRM, you must also change the IP of the USRM in the VASP List on the DNCS. Actually the IP address field in the VASP List is not editable, so you need to note the following, delete the VASP entry, and add it back with the same VASP ID and the new IP address:

   - VASP Type: SDV Server (even if the USRM is a VSM, choose VASP type "SDV Server")

   - VASP ID: x

   - IP Address:

   - Status: {Out of Service | In Service}

1 REPLY
New Member

If I’m re-IPing the DNCS, what changes need to be made on the

SOFTWARE VERSION: All USRM software releases.

If you’re just changing the IP address of the dncsatm host on the DNCS you only have to

change 2 things on the USRM:

1. The "dncsatm" host entry in /etc/hosts has be modified to reflect the new IP address of

the dncsatm interface on the DNCS.

2. The /opt/usrm/ConfigFiles/SnmpAgent.txt file must be modified if the USRM is to run in

"supervised" mode, meaning that the DNCS will provision the USRM via SNMP.

However, if you change the IP address of eth0 on the USRM, the update_persistdata script

should be used to update the “creator IP” field embedded in all of the persistdata files

on the USRM to contain the new IP address of eth0 on the USRM. So, to change the IP

address of eth0 on the USRM, you will need to:

1. Edit IPADDR, NETMASK and GATEWAY fields in the

/etc/sysconfig/network-scripts/ifcfg-eth0 file.

2. Modify the Primary USRM’s persistdata files with the update_persistdata tool and the

new IP address of eth0.

3. If you also change the IP address of eth1 on the USRM, you just need to edit the IPADDR

and NETMASK fields in the /etc/sysconfig/network-scripts/ifcfg-eth1. The IP address of

eth1 is not the “creator IP”, the IP address of eth0 is.

4. If you change the IP address of eth0 on the USRM, you must also change the IP of the USRM in the VASP List on the DNCS. Actually the IP address field in the VASP List is not editable, so you need to note the following, delete the VASP entry, and add it back with the same VASP ID and the new IP address:

   - VASP Type: SDV Server (even if the USRM is a VSM, choose VASP type "SDV Server")

   - VASP ID: x

   - IP Address:

   - Status: {Out of Service | In Service}

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