•
• For graceful termination conditions (e.g. an administrative user issues the reload command), sends a termination message to the secondary HA causing it to assume the responsibilities of the primary HA until the primary is available again.
• For graceful termination conditions (e.g. an administrative user issues the reload command), it notifies the primary HA that it is going out of service
•
• New sessions: Once IPSP is configured, new sessions are directed to a secondary HA (HA2) allowing the primary HA to go through a software upgrade without degrading network capacity. The secondary HA requests addresses from the primary HA’s (HA1) pools as needed. As the addresses are allocated, they are busied out on the primary HA. This procedure is displayed below.
• Session handoffs: Once IPSP is configured, sessions originally registered with the primary HA (HA1) are re-registered with the secondary HA (HA2). To ensure the session is assigned the same IP address, the secondary HA requests the address from the primary HA. The primary HA verifies the binding and releases it to the secondary HA which, in turn, re-assigns it to the session. As the addresses are allocated, they are busied out on the primary HA. This procedure is displayed below.
This section provides information and instructions for configuring IPSP before the software upgrade.Important: This section provides the minimum instruction set for configuring IPSP on the system. For more information on commands that configure additional parameters and options, refer to the IPSP Configuration Mode Commands chapter in the Command Line Interface Reference.
Step 1
Step 2 Configure an interface on the system for use by IPSP according to the instructions found in the Creating and Configuring Ethernet Interfaces and Ports section of the System Administration Guide.
Step 3
Step 4 Perform the boot system priority and SPC/SMC card synchronization as described in Off-line Software Upgrade section in the System Administration Guide.
Step 5
Step 6 Verify your ACL configuration by following the steps in the Verifying the IPSP Configuration section.
Step 7 Proceed for software upgrade as described in Off-line Software Upgrade section in the System Administration Guide.
Step 8 Save your configuration as described in the Saving Your Configuration chapter.Important: This section provides the minimum instruction set for configuring IPSP on the system. For more information on commands that configure additional parameters and options, refer to the IPSP Configuration Mode Commands chapter in Command Line Interface Reference.
• ipsp_if_name is the name of the interface on which you want to enable IPSP.Important: This section provides the minimum instruction set for configuring IPSP on the system. For more information on commands that configure additional parameters and options, refer to the IPSP Configuration Mode Commands chapter in the Command Line Interface Reference.
• ipsp_if_name is the name of the interface on which you want to enable IPSP.Important: Once this configuration is done, the primary HA begins to hand responsibility for sessions and release IP addresses to the secondary HA. Prior to performing the software upgrade, all IP addresses must be released. When IPSP has released all IP pool addresses from the primary HA an SNMP trap (starIPSPAllAddrsFree) is triggered.
The output of this command provides the list of used addresses and released addresses. The system will send the starIPSPAllAddrsFree trap once all IP addresses are released. When the value in the Used Addresses column reaches 0 for all IP pools listed, then the primary HA sends the SNMP trap and notifies the secondary HA to take over as the primary HA.Important: It is important to note that the HA that was originally designated as the secondary is now functioning as the primary HA. Conversely, the HA that was originally designated as the primary is now functioning as the secondary.
Important: This section provides the minimum instruction set for configuring IPSP on the system. For more information on commands that configure additional parameters and options, refer IPSP Configuration Mode Commands chapter in Command Line Interface Reference.
Step 1
Step 2
Step 3
Step 4
Step 5 Verify your ACL configuration by following the steps in the Verifying the IPSP Configuration section.
Step 6 Save your configuration as described in the Saving Your Configuration chapter.Caution: Prior to disabling IPSP, ensure that the primary HA has released all IP addresses to secondary HA.
Important: This section provides the minimum instruction set for disabling IPSP on the HAs. For more information on commands, refer to the IPSP Configuration Mode Commands chapter in the Command Line Interface Reference.
• ipsp_if_name is the name of the interface on which you want to disable IPSP.
![]() |
Cisco Systems Inc. |
Tel: 408-526-4000 |
Fax: 408-527-0883 |