hsrp modification

Unanswered Question
Mar 26th, 2010
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What are the consequences on the active traffic of modifying hsrp configuration between two routers : I want to change stanby priority so that my backup router becomes the master one on several vlans :

from

router 1 :

interface vlan 20

  ip address 172.17.1.10 255.255.0.0

standby ip 172.17.1.1
standby priority 110
standby preempt
end

router 2 :

interface vlan 20

ip address 172.17.1.11 255.255.0.0

standby ip 172.17.1.1
standby priority 100

standby preempt
end


TO

router 1 :

interface vlan 20

ip address 172.17.1.10 255.255.0.0

standby  ip 172.17.1.1

standby priority 100
  standby preempt
end

router 2 :

interface vlan 20

ip address  172.17.1.11 255.255.0.0

standby ip 172.17.1.1
standby priority 110

standby preempt
end

Does this implies network flow interruption ? if yes, for how many times ?

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Giuseppe Larosa Fri, 03/26/2010 - 08:24
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Hello Valerie,

there will not be any impact

new active HSRP router sends out a gratuitous ARP to update LAN switches CAM tables


Hope to help

Giuseppe

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