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10-14
Cisco PIX Firewall and VPN
78-15033-01
Chapter 10 Using PIX Firewall Failover
Configuring LAN-Based Failover
c.
primary(config)#
ip
address interface_name
ip_address [netmask]
Sets the IP address.
For example:
primary(config)# ip address state 192.168.3.1
255.255.255.0
Step 3
primary(config)# failover ip
address interface_name
ip_address
For each interface that has an IP address, this command identifies
the failover IP
address. This IP address is used on the standby unit.
This IP address must be in the same subnet as the active
IP
address. You do not need to identify the subnet mask. To check
the current IP address settings, enter the show ip address
command.
You must use static IP addresses with failover configurations; you
cannot use IP addresses obtained through DHCP or PPPoE.
Note You must set the failover IP address for the failover link,
even though the failover link IP address and MAC address
do not change at failover. The active IP address always
stays with the primary unit, while the failover IP address
stays with the secondary unit.
The following example sets the IP addresses for the active unit and
for the standby unit:
primary(config)# ip address inside 10.1.1.1 255.255.255.0
primary(config)# failover ip address inside 10.1.1.2
primary(config)# ip address outside 192.168.1.1
255.255.255.0
primary(config)# failover ip address outside 192.168.1.2
primary(config)# ip address faillink 192.168.2.1
255.255.255.0
primary(config)# failover ip address faillink 192.168.2.2
primary(config)# ip address state 192.168.3.1
255.255.255.0
primary(config)# failover ip address state 192.168.3.2
Step 4
primary(config)# failover link
interface_name
(Stateful Failover) Specifies the state link interface.
For example, to set the “state” interface as the state link, enter:
primary(config)# failover link state
Step 5
primary(config)# failover poll
seconds
(Optional) Sets a time shorter than 15 seconds for the units to
exchange “hello” packets.
Where seconds is an integer between 3 and 15. The default is
15
seconds.
You might want to set a lower value for Stateful Failover, to make
sure that the state information is up to date. With a faster poll time,
the PIX
Firewall can detect failure faster. However, faster
detection may cause unnecessary switchovers when the network is
temporarily congested or a network card starts slowly.
Step 6
primary(config)# failover lan
unit primary
Sets this PIX Firewall as the primary unit.
Step/Command Description
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