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New Member

HSRP FOR 2 X3660 ROUTER

HELLO,

I WANT APPLY HSRP ON 2 X 3660 ROUTERS WITH TWO FASTETHERNET PORTS

.PLEASE HELP ME.

2 REPLIES
New Member

Re: HSRP FOR 2 X3660 ROUTER

for example:

interface fastethernet 0/0

ip address 192.168.1.252 255.255.255.0 (local ip @)

standby 1 ip 192.168.1.254 (IP@ that will be seen in LAN)

standby 1 priority 120 (default pri is 100, so will give that interface more chance to be the primary)

standby 1 preempt

in the other rtr

interface fastethernet 0/0

ip address 192.168.1.253 255.255.255.0 (local ip @)

standby 1 ip 192.168.1.254 (IP@ that will be seen in LAN)

(keep default pri :100)

Cisco Employee

Re: HSRP FOR 2 X3660 ROUTER

This is how you will have to configure HSRP:

RTR#1: (Active router)

=====

interface fastethernet 0/0

ip address 192.168.1.2 255.255.255.0

standby 1 ip 192.168.1.1 <---(1)

standby 1 priority 105 <---(2)

standby 1 preempt <---(3)

RTR#2: (Standby router)

=====

interface fastethernet 0/0

ip address 192.168.1.3 255.255.255.0

standby 1 ip 192.168.1.1

(1) Routers need to have the interface IP address on the same logical network as the virtual IP address.

(2) Default priority is 100 points as pointed out and would be the priority assumed by RTR#2. Priority determines the preferred HSRP Active device, but priorities MUST BE WITHIN 10 points.

If a condition is linked to the HSRP process such as 'standby 1 track interface serial0/0', when interface S0/0 fails, HSRP will decrement priority by 10 points. If priority is configured as 120 vs. 100, RTR#1 would still have a higher priority and not relinquish the active role.

The default priority decremet can also be changed if needed, but 'within 10 points' is the recommended use, unless schema is far more complex.

***Please note that a higher configured priority would not increase the chances of a specific device in becoming the active device, a difference of 1 or 100 points is treated the same way by the IOS.***

(3) Preempt enables preferred router to take over active role once normal condition is restored.

I recommend you check the following URL regarding HSRP.

http://www.cisco.com/en/US/tech/tk1330/technologies_design_guide_chapter09186a008066670b.html

I hope this helps.

Oscar Madrid

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