Archive for the HSRP Protocol (fail-over) Category

HSRP – Hot Swappable Routing Protocol (fail-over)

Posted in HSRP Protocol (fail-over) on April 25, 2008 by itdaddy

 

 

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R1 Config
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Note: below commands all done in interface config mode

interface ethernet 0

ip address 1.0.0.1 255.0.0.0

standby 1 ip 1.0.0.3

standby 1 preempt

standby 1 priority 110

standby 1 authentication denmark

standby 1 timers 5 15

Note:all commands below done in router config mode

router eigrp 1

network 1.0.0.0

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R2 Config
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Note: all commands below done in interface config mode

interface ethernet 0

ip address 1.0.0.2 255.0.0.0

standby 1 ip 1.0.0.3

standby 1 preempt

standby 1 authentication denmark

standby 1 timers 5 15

Note: all commands below done in router config mode

router eigrp 1

network 1.0.0.0

 **********www.cisco.com the below taken from*********

The Standby IP interface configuration command enables HSRP and establishes 1.0.0.3 as the IP address of the virtual router. The configurations of both routers include this command so that both routers share the same virtual IP address. The 1 establishes Hot Standby group 1. (If you do not specify a group number, the default is group 0.) The configuration for at least one of the routers in the Hot Standby group must specify the IP address of the virtual router; specifying the IP address of the virtual router is optional for other routers in the same Hot Standby group.

The standby preempt interface configuration command allows the router to become the active router when its priority is higher than all other HSRP-configured routers in this Hot Standby group. The configurations of both routers include this command so that each router can be the standby router for the other router. The 1 indicates that this command applies to Hot Standby group 1. If you do not use the standby preempt command in the configuration for a router, that router cannot become the active router.

The standby priority interface configuration command sets the router’s HSRP priority to 110, which is higher than the default priority of 100. Only the configuration of Router A includes this command, which makes Router A the default active router. The 1 indicates that this command applies to Hot Standby group 1.

The standby authentication interface configuration command establishes an authentication string whose value is an unencrypted eight-character string that is incorporated in each HSRP multicast message. This command is optional. If you choose to use it, each HSRP-configured router in the group should use the same string so that each router can authenticate the source of the HSRP messages that it receives. The “1” indicates that this command applies to Hot Standby group 1.

The standby timers interface configuration command sets the interval in seconds between hello messages (called the hello time) to five seconds and sets the duration in seconds that a router waits before it declares the active router to be down (called the hold time) to eight seconds. (The defaults are three and 10 seconds, respectively.) If you decide to modify the default values, you must configure each router to use the same hello time and hold time. The “1” indicates that this command applies to Hot Standby group 1.

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HSRP
Go to this link – Nice Cisco Workup of HSRP
Click link below. Download to your PC and Save/Print it out.
It is from Cisco.com website.  Teaches HSRP. 
https://itdaddy.files.wordpress.com/2008/04/hsrp.pdf
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You Tube HSRP free video freaking awesome Click below link!

http://www.youtube.com/watch?v=2-EtRgAEHiE

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