HSRP FALL BACK ISSUE

[sankarmay]

Dear Team,

I am running HSRP for my LAN.whenever my R4 is going down R5 came to active but if R4 came up again the fall back is not happening up to my R5 is going down.

R4 :

R4#sh run int fa0/0
Building configuration...

Current configuration : 194 bytes
!
interface FastEthernet0/0
ip address 10.10.10.1 255.255.255.0
duplex auto
speed auto
standby preempt
standby 1 ip 10.10.10.5
standby 1 priority 150
standby 1 track FastEthernet0/1
end

R4#show standby brief
P indicates configured to preempt.
|
Interface Grp Prio P State Active Standby Virtual IP
Fa0/0 1 150 Standby 10.10.10.3 local 10.10.10.5
R4#

R5 :

R5#sh run int fa0/1
Building configuration...

Current configuration : 163 bytes
!
interface FastEthernet0/1
ip address 10.10.10.3 255.255.255.0
duplex auto
speed auto
standby 1 ip 10.10.10.5
standby 1 priority 110
standby 1 preempt
end

R5#show standby brief
P indicates configured to preempt.
|
Interface Grp Prio P State Active Standby Virtual IP
Fa0/1 1 110 P Active local 10.10.10.1 10.10.10.5
R5#

See but still priority is high for R4 only but R5 is in active state.

Can anyone explain for me.

[Mark Malone]

can you turn on hsrp debug standby events and errors and terminal monitor , fail it over and capture the output to see whats happening , it should take over if higher pri is seen and preemption is enabled

can you also post the show standby
There may be a software issue , has this worked before ? what software and platform is this on ?

[Yachay · Accepted solution]

The HSRP group in R4 is missing for the preempt command.

[sankarmay]

Thanks for all reply.



I have retested it is working after standby 1 preempt command applied.

[paul driver · Accepted solution]

Hello

---

@sankarmay wrote:

See but still priority is high for R4 only but R5 is in active state.

Can anyone explain for me.

---

Prime example of preemption not kicking correctly on R4 -
Can you remove and re-apply preemption of both rtrs and test again?

res
Paul

[sankarmay]

Thanks for all reply.



I have retested it is working after standby 1 preempt command applied.