Cho sơ đồ như sau:

Cấu hình HSRP cho sơ đồ này.

R1 làm Active; R2 làm Standby.

Lưu ý: Router dùng Cisco IOL L3; Switch dùng Cisco IOL L2.

Cấu hình IP cho R1:

en

conf t

hostname R1

int e0/1

 no sh

 ip address dhcp

 exit

int e0/0

 no sh

 ip address 192.168.100.1 255.255.255.0

 exit

Cấu hình IP cho R2:

en

conf t

hostname R2

int e0/1

 no sh

 ip address dhcp

 exit

int e0/0

 no sh

 ip address 192.168.100.2 255.255.255.0

 exit

Cấu hình HSRP trên R1:

interface E0/0

 standby version 2

 standby 1 ip 192.168.100.254

 standby 1 priority 120

 standby 1 preempt

 exit

Cấu hình HSRP trên R2:

interface E0/0

 standby version 2

 standby 1 ip 192.168.100.254

 exit

Xem cấu hình HSRP:

show standby

show standby brief

R1#show standby

Ethernet0/0 - Group 1 (version 2)

  State is Active

    2 state changes, last state change 00:00:08

  Virtual IP address is 192.168.100.254

  Active virtual MAC address is 0000.0c9f.f001

    Local virtual MAC address is 0000.0c9f.f001 (v2 default)

  Hello time 3 sec, hold time 10 sec

    Next hello sent in 2.480 secs

  Preemption enabled

  Active router is local

  Standby router is unknown

  Priority 120 (configured 120)

  Group name is "hsrp-Et0/0-1" (default)

R1#

R2#show standby

Ethernet0/0 - Group 1 (version 2)

  State is Standby

    1 state change, last state change 00:00:22

  Virtual IP address is 192.168.100.254

  Active virtual MAC address is 0000.0c9f.f001

    Local virtual MAC address is 0000.0c9f.f001 (v2 default)

  Hello time 3 sec, hold time 10 sec

    Next hello sent in 2.896 secs

  Preemption disabled

  Active router is 192.168.100.1, priority 120 (expires in 7.856 sec)

    MAC address is aabb.cc00.1000

  Standby router is local

  Priority 100 (default 100)

  Group name is "hsrp-Et0/0-1" (default)

R2#

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