Cisco 7604 Configuration Guide - Page 275
Failover Configuration Limitations, Using Active/Standby Failover, Prerequisites
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Chapter 14 Configuring Failover Configuring Failover Failover Configuration Limitations You cannot configure failover with the following type of IP addresses: • IP addresses obtained through DHCP • IPv6 addresses Using Active/Standby Failover This section provides step-by-step procedures for configuring Active/Standby failover. This section includes the following topics: • Prerequisites, page 14-21 • Configuring Active/Standby Failover, page 14-21 • Configuring Optional Active/Standby Failover Settings, page 14-24 See the "Failover Example Configurations" section on page B-18 for examples of typical failover configurations. Prerequisites Before you begin, verify the following: • Both units have the proper license. Both units in a failover pair must have the same license. • If the primary unit is in single context mode, the secondary unit must also be in single context mode and be in the same firewall mode as the primary unit. • If the primary unit is in multiple context mode, the secondary unit must also be in multiple context mode. You do not need to configure the firewall mode of the security contexts on the secondary unit because the failover and state links reside in the system context. The secondary unit obtains the security context configuration from the primary unit. Note The mode command does not get replicated to the secondary unit. Configuring Active/Standby Failover This section describes how to configure Active/Standby failover. You must configure the secondary unit to recognize the failover link before the secondary unit can obtain the running configuration from the primary unit. This section includes the following topics: • Configuring the Primary Unit, page 14-21 • Configuring the Secondary Unit, page 14-23 Configuring the Primary Unit Follow these steps to configure the primary unit in an Active/Standby failover configuration. These steps provide the minimum configuration needed to enable failover on the primary unit. For multiple context mode, all steps are performed in the system execution space unless otherwise noted. OL-20748-01 Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM 14-21
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