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HSRP Hot standby Routing Protocol
Overview:
R1 and R2 are to work in active or passive mode. In the
configuration, R1 is the Routerwith higher priority. Usually R1 is
active and R2 stays in passive mode. Blue area
represents HSRP group 10, red area means HSRP group 1.
You can check the mechanism when you stop R1, Check with ping
from PC1 to PC2s IP.Be patient because to became active state some
seconds are needed.
PC1 and PC2 are represented by a Cisco Router because GNS3 is
not able to use anyimages for real PCs, so we use a C2621 Router to
test our network. You are able to useping and traceroute to test
the whole Network.
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Configurations:
Router R1:
Building configuration...
!! some lines deleted!!hostname R1!!! some lines
deleted!!interface FastEthernet0/0ip address 192.168.30.254
255.255.255.0duplex autospeed autostandby 1 ip 192.168.30.1 ! this
is the address for the default GW
standby 1 priority 110standby 1 preemptstandby 1 track
FastEthernet1/0 20!interface FastEthernet1/0ip address
192.168.20.254 255.255.255.0duplex autospeed autostandby 10 ip
192.168.20.1standby 10 priority 120standby 10 preempt!! some lines
deleted!!!endRouter R2
R2#Building configuration...
!! some lines deleted!!hostname R2!! some lines
deleted!!interface FastEthernet0/0ip address 192.168.30.253
255.255.255.0duplex autospeed autostandby 1 ip 192.168.30.1standby
1 priority 90!interface FastEthernet1/0ip address 192.168.20.253
255.255.255.0duplex autospeed autostandby 10 ip 192.168.20.1
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standby 10 priority 50standby 10 preempt!! some lines
deleted!!end
Configuration for PC1 and PC2
All we have to do is to configure the hostname, to no shutdown
the used interfaces and toconfigure interfaces IP address. Now you
have to configure a Default-GW. Well do it witha static Route
0.0.0.0 0.0.0.0 192.168.20.1 for PC1 and 0.0.0.0 0.0.0.0
192.168.30.1 forPC2 (the standby address from HSRP config.)
Now its time to test your HSRP-Lab
Go to PC1s console to enable mode and try to ping 192.168.30.10.
set the repeat optionof ping to as higher as default (ping
192.168.30.10 repeat 200). Delete the wire betweenR1 f0/0 SW2 and
attend the reaction of your lab. Reinstall the cable from R1 f0/0
SW1.In a few seconds, R1 gets active again and R2 works in standby
mode.
Have fun I had
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Configuration PC1
PC1#Building configuration...
!
hostname PC1!! !interface FastEthernet0/0ip address
192.168.20.10 255.255.255.0duplex autospeed auto!!ip classlessip
route 0.0.0.0 0.0.0.0 192.168.20.1!
! ...!!end
Configuration PC2
PC2#Building configuration...
!hostname PC2!
! !interface FastEthernet0/0ip address 192.168.30.10
255.255.255.0duplex autospeed auto!ip route 0.0.0.0 0.0.0.0
192.168.30.1!!! !end
