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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