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Beginner

Will changing to HRSP standby address require a reboot of router ?

Hi Expert,

I using HRSP for router redundancy, recently we made some changes to our network and this will require a change in the virtual (standby ip)

address of HRSP configuration,

Hence I would like to know if this change is effected will a reboot of both router be necessary.

Below is subset of the current configurations for the two routers.

Standby address 192.168.81.3 will be change to 192.168.81.1

interface Vlan1
description Production Vlan
ip address 192.168.81.4 255.255.254.0
no ip redirects
standby 10 ip 192.168.81.3
standby 10 priority 120
standby 10 preempt


interface Vlan1
description Internal Interface
ip address 192.168.81.5 255.255.254.0
no ip redirects
standby 10 ip 192.168.81.3
standby 10 priority 110

 

standby 10 ip 192.168.81.1 ---------------------------------NEW STANDBY ADDRESS

Regards

Jomo

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Advisor

Will changing to HRSP standby address require a reboot of router

I don't believe it will, but you should change the standby router first before changing the primary. After changing the primary, you'll need to make sure that whatever hosts were using the .3 as a default gateway is also changed to .1.

HTH,
John

*** Please rate all useful posts ***

HTH, John *** Please rate all useful posts ***

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2 REPLIES 2
Highlighted
Advisor

Will changing to HRSP standby address require a reboot of router

I don't believe it will, but you should change the standby router first before changing the primary. After changing the primary, you'll need to make sure that whatever hosts were using the .3 as a default gateway is also changed to .1.

HTH,
John

*** Please rate all useful posts ***

HTH, John *** Please rate all useful posts ***

View solution in original post

Highlighted
VIP Expert

Re: Will changing to HRSP standby address require a reboot of ro

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Posting

Should be no need to reboot routers.  I would, though, be concerned about changing the virtual gateway IP, for the same group, while any HSRP group peers are active.  What John suggested might work fine, but I would recommend taking down the standby group peer(s), then changing the IP for the hot HSRP peer, then reactivating the standby group peer(s) (also with the new IP).  Functionally, this should be like changing the interface's "real" IP.

Another method, if your devices support mHSRP and you're not committed to using a particular group number, define the new IP under a new standby group.  This can ease the transition of hosts from old to new IP as both will work.  Once the transition is completed, remove the original standby group.

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