Cisco HRSP Load Balancing Protocol

Hot Standby Router Protocol (HSRP) is a Cisco proprietary redundancy protocol for establishing a fault-tolerant default gateway.

Primary-Router-Config :

interface GigabitEthernet0/0
 description Comms-Primary-Router
 ip address 10.10.10.1 255.255.255.0
 ip nat inside
 ip inspect myfw in
 ip virtual-reassembly
 duplex auto
 speed auto
 standby 1 ip 10.10.10.3
 standby 1 timers msec 500 2
 standby 1 priority 110
 standby 1 preempt delay minimum 1
 standby 1 authentication LocalLan
 standby 1 name Group1
 standby 1 track 4 decrement 100
 standby 1 track 5 decrement 15
 !
!
interface GigabitEthernet0/1
 description WAN_Interface
 ip address 1.1.1.1 255.255.255.0
 ip nat outside
 ip virtual-reassembly
 duplex auto
 speed auto
!
!
track 4 interface GigabitEthernet0/0 line-protocol
!
track 5 interface GigabitEthernet0/1 line-protocol
!

Secondary-Router-Config :

interface GigabitEthernet0/0
 description Comms-Seondary-Router
 ip address 10.10.10.2 255.255.255.0
 ip nat inside
 ip inspect myfw in
 ip virtual-reassembly
 duplex auto
 speed auto
 standby 1 ip 10.10.10.3
 standby 1 timers msec 500 2
 standby 1 preempt delay minimum 1
 standby 1 authentication LocalLan
 standby 1 name Group1
 standby 1 track 4 decrement 100
 standby 1 track 5 decrement 15
!
!
interface GigabitEthernet0/1
 description WAN_Interface
 ip address 1.1.1.1 255.255.255.0
 ip nat outside
 ip virtual-reassembly
 duplex auto
 speed auto
!
!
track 4 interface GigabitEthernet0/0 line-protocol
!
track 5 interface GigabitEthernet0/1 line-protocol