Re: HSRP preempt

From: Mohammad Mousa <mohd-mousa_at_hotmail.com>
Date: Mon, 26 Nov 2012 17:47:53 +0300

(STANDBY)R1---R2(ACTIVE)

R1

---
interface FastEthernet0/0
ip address 12.0.0.1 255.255.255.0
duplex auto
speed auto
standby 1 ip 12.0.0.254
R2
---
track 1 ip route 1.1.1.1 255.255.255.255 reachability
interface FastEthernet0/0
ip address 12.0.0.2 255.255.255.0
duplex auto
speed auto
standby 1 ip 12.0.0.254
standby 1 track 1 decrement 20
OUTPUT:
I shut the loopback interface of R1, which led the Tracker to be down on R2!
R2(config)#do sh standby
FastEthernet0/0 - Group 1
  State is Active
    1 state change, last state change 00:05:06
  Virtual IP address is 12.0.0.254
  Active virtual MAC address is 0000.0c07.ac01
    Local virtual MAC address is 0000.0c07.ac01 (v1 default)
  Hello time 3 sec, hold time 10 sec
    Next hello sent in 2.208 secs
  Preemption disabled
  Active router is local
  Standby router is 12.0.0.1, priority 100 (expires in 7.600 sec)
  Priority 80 (default 100)
    Track object 1 state Down decrement 20
  Group name is "hsrp-Fa0/0-1" (default)
---
R2(config)#do sh track
Track 1
IP route 1.1.1.1 255.255.255.255 reachability
Reachability is Down (no route)
2 changes, last change 00:01:43
First-hop interface is unknown
Tracked by:
HSRP FastEthernet0/0 1
On Nov 26, 2012, at 5:19 PM, Mohammad Mousa wrote:
> Guys,
> 
> I just Labed it up, as I said the standby router didn't take the active role unless I configured the preemption!
> If you interested to see the configuration, let me post the configs.
> 
> 
> --
> Mohammad Mousa
> CCIE #36990
> 
> 
> 
> 
> 
> 
> On Nov 26, 2012, at 4:31 PM, Tony Singh wrote:
> 
>> No preemption is required for switch to occur , lab it
>> 
>> --
>> BR
>> 
>> Tony
>> 
>> Sent from my iPhone on 3
>> 
>> On 26 Nov 2012, at 13:26, Tauseef Khan <tasneemjan_at_googlemail.com> wrote:
>> 
>>> If the priority is same on 2 routers participating in standby group 1 with
>>> default priority of 100 and no preempt enable an either of the routers and
>>> a standby track 1 reach dec 10 is configured. I f the track object goes
>>> down will it cause an election between the routers.
>>> Regards
>>> 
>>> 
>>> Blogs and organic groups at http://www.ccie.net
>>> 
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>> 
>> 
>> Blogs and organic groups at http://www.ccie.net
>> 
>> _______________________________________________________________________
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> 
> 
> Blogs and organic groups at http://www.ccie.net
> 
> _______________________________________________________________________
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Received on Mon Nov 26 2012 - 17:47:53 ART

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