HOT STAND BY ROUTING PROTOCOL (HSRP) WITH LAB SEESSION ON GNS3

 HSRP

Cisco developed the proprietary Hot Standby Router Protocol (HSRP) to
allow multiple routers or multilayer switches to masquerade as a single
gateway. This is accomplished by assigning a virtual IP and MAC address
to all routers participating in an HSRP group.
Routers within the same HSRP group must be assigned the same group
number, which can range from 0 to 255. However, most Cisco platforms
only support 16 configured HSRP groups.

HSRP routers are elected to specific roles:

• Active Router – router currently serving as the gateway.
• Standby Router – backup router to the Active Router.
• Listening Router – all other routers participating in HSRP.

Only one active and one standby router are allowed per HSRP group. Thus,
HSRP provides Layer-3 redundancy, but no inherent load balancing.
Hello packets are used to elect HSRP roles and to ensure all routers are
functional. If the current active router fails, the standby router will
immediately take over as active, and a new standby is elected. By default,
hello packets are sent every 3 seconds.
The role of an HSRP router is dictated by its priority. The priority can range
from 0 – 255, with a default of 100. A higher priority is preferred.

To achieve load balancing with this HSRP setup, half of the hosts in VLAN
100 must point to the first virtual address as their gateway. The
other half must use the other virtual address as their gateway.
 

LAB SESSION :

OBJECTIVE :Configuring HSRP With Load balance Using GNS3

TOPOLOGY:

HSRP

VIDEO TUTORIAL CLICK ON THE LINK

VIDEO TUTORIAL

 

 SW1 CONFIGURATION

 SW1(config)# interface FastEthernet1/1

 SW1(config-if)# switchport mode trunk

 SW1(config-if)exit

 SW1(config)#interface Vlan50

 SW1(config-if)#ip address 192.168.1.10 255.255.255.0
 SW1(config-if)standby 1 ip 192.168.1.1
 SW1(config-if)standby 1 priority 200
 SW1(config-if)standby 1 preempt
 SW1(config-if)standby 2 ip 192.168.1.2
SW1(config-if)standby 2 priority 100

  SW2 CONFIGURATION

SW2(config)#interface FastEthernet1/1

SW2(config-if)#switchport mode trunk

SW2(config-if)#exit

SW2(config)#interface Vlan50 
SW2(config-if)# ip address 192.168.1.11 255.255.255.0 
SW2(config-if)# standby 1 ip 192.168.1.1 
SW2(config-if)# standby 1 priority 100
SW2(config-if)# standby 2 ip 192.168.1.2 
SW1(config-if)# standby 2 priority 200 
SW1(config-if)# standby 2 preempt

PC CONFIGURATION

PC1>ip 192.168.1.101 255.255.255.0 192.168.1.1

PC1>save

PC2>ip 192.168.1.102 255.255.255.0 192.168.1.1

PC2>save

PC3>ip 192.168.1.103 255.255.255.0 192.168.1.2

PC3>save

PC3>ip 192.168.1.104 255.255.255.0 192.168.1.2

PC3>save

Output To Verify the HSRP

 SW 1 

 SW1#sh standby brief
                     P indicates configured to preempt.
                     |
Interface       Grp   Prio  P   State       Active             Standby                   Virtual IP   
Vl50                1      200   P   Active      local               192.168.1.11            192.168.1.1  
Vl50                2     100         Standby  192.168.1.11    local                        192.168.1.2 

SW2

SW2#show standby brief
                     P indicates configured to preempt.
                     |
Interface       Grp   Prio   P     State         Active               Standby             Virtual IP    
Vl50               1       100            Standby   192.168.1.10      local                  192.168.1.1   
Vl50              2       200   P      Active       local                  192.168.1.10     192.168.1.2

 

 CLICK HERE TO DOWNLOAD HSRP PROJECT FOR GNS3 LAB

For any Queries feel free to mail me at :

abhishek.verma7@gmail.com

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