Deploy Cisco EGW 2200 as a fault-tolerant pair

Note: Perform this task before you begin Cisco EGW 2200 provisioning, to avoid post-provisioning downtime. The required restart takes about 10 minutes.

If for some reason the peer system in a fault-tolerant configuration goes offline, you can provision the active Cisco EGW 2200 and have the changes updated to the peer after it comes back online. Virtual Fault Tolerance lets you provision the active system and avoid error messages that would normally occur when the configuration could not be replicated on the peer. Fault tolerance is automatically restored when the peer comes back online.

Steps

1. Open Cisco EGW Administration for the active system.
2. On the Cisco EGW Home page, select Virtual Fault Tolerance. Refer to Cisco EGW Administration online help for instructions.

Typically you would change IP addresses only as part of a major network change, such as moving your network or changing its topology.

Caution: To preserve your active configuration, this procedure must be performed in the prescribed sequence.

Note: If the new IP address is on a different subnet from the original IP address, and you defined a SIP virtual IP address during installation, then you will also need to change the SIP virtual IP address so that it too is in the new subnet. You do this in Cisco EGW Administration: Go to the Unity SIP Interface page.

Before you begin:

• Have Cisco EGW 1.1(2) patch 7 or higher installed. Refer to the Release Notes for Cisco EGW 2200 1.1(2) for patch location and upgrade information. You must have patch 7 or higher to change IP addresses on either or both systems in a fault-tolerant pair.
• Back up the current configuration. You could restore the backup if you decide not to change IP addresses after you have begun. (The backup is not applicable after an intentional IP address change, since it has the obsolete IP addresses.)
• No calls should be running on the system, because there will be multiple system restarts and a period when calls are not being processed.

Conditions: Two Cisco EGW 2200 systems configured in a fault-tolerant pair. EGW A is the initially active system. EGW B is the standby peer.

Steps

Step 1. Change the IP address(es) on the standby system, EGW B:

1. Open Cisco IPT Platform Administration for the standby system, EGW B.
2. Choose Settings > IP Settings. Make the desired modifications to Ethernet 0 IP Address, Ethernet 1 IP Address, or both.
3. Click Execute. EGW B restarts.

Caution: Upon restart, the EGW B configuration reverts to the default, empty configuration. EGW A still has the active configuration. In the next step, when you enter the new peer IP address(es) on EGW A, the active configuration is copied to EGW B. For this reason, make sure you do not change the IP address on EGW A (and lose its configuration) until step 2 is complete.

Step 2. On EGW A, set up fault tolerance including (the new) peer IP addresses:

1. Open Cisco EGW Administration for EGW A.
2. On the Cisco EGW Home page, fault tolerance should still be checked (with the obsolete peer IP address.) Entering the new peer IP addresses. Refer to Cisco EGW Administration online help for instructions.

   EGW A restarts as the active system in a fault-tolerant pair. EGW B restarts as the standby system. The active configuration is copied to EGW B

Step 3. Make EGW A the standby:

1. Open Cisco IPT Platform Administration for the active system, EGW A.
2. On the Cisco EGW Home page, click Switchover.

EGW B is now the active and EGW A is now the standby system.

Step 4. Perform Step 1 (change IP address(es) on the new standby, EGW A.

EGW A now has new IP address(es) but has reverted to the default, empty configuration. You will correct this in the next step.

Step 5. Perform Step 2 (set up fault tolerance) on the new active system, EGW B.

Upon EGW B restart, the active configuration is copied from EGW B to its peer, EGW A. The systems are now a fault-tolerant pair with the correct, matching configuration.

Recommended: Create a new backup after the IP change. Refer to Backing Up the Cisco EGW 2200 Software.

Configure SNMP on the Cisco EGW:

Steps

1. Open Cisco IPT Platform Administration.
2. Click SNMP. Refer to Cisco IPT Platform Administration online help for instructions.

For MIB information, use the Cisco PGW MIB Reference (Cisco PGW MIBs are the same as the MIBs on the Cisco EGW).