vrrp backup master on Nortel switches!!

Answered Question
Feb 1st, 2010

Hi

We are migrating the last of our Nortel devices to cisco now, I have one question, the nortel vrrp feature has a function wherby if you have a cluser of 2 switches, if the traffic hits the standby switch, the function will route it locally.

my question is if I switch this function off on the standby router, will the clients continue to route via the active one? or will i need to flush all the arp tables on pc's routing behind it? or do they use the same mac address so it will be ok?

cheers

Carl

I have this problem too.
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Correct Answer by Ganesh Hariharan about 6 years 10 months ago

hi ganeshh

can you tell me what you mean by

"Yes there will be drop from 2 - 3 when Master goes down and Backup comes into picture for vrrp group and 1-2 drop when Master comes back in Master stage of vrrp group."

by turning off the backup master function for 1 vlan, will the clients need to re arp etc? or do they still use the vip mac address, im gathering they use the vip mac address here, so switching it off should be fine?

thanks

Carl

Carl,

I was actually means for RTO just when ever you ping the vip and master router goes down and backup takes postion of master there will 2 - 3 RTO's.

and Yes by turning off the backup routerconfigurion of vrrp in vlan they will still use the vip mac address where your Master router is active for the vlan and hence the traffic will be moving without any direuption.

Hope that clear out your query !!

If helpful do rate the valauble post

Ganesh.H

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Ganesh Hariharan Mon, 02/01/2010 - 06:50

Hi

We are migrating the last of our Nortel devices to cisco now, I have one question, the nortel vrrp feature has a function wherby if you have a cluser of 2 switches, if the traffic hits the standby switch, the function will route it locally.

my question is if I switch this function off on the standby router, will the clients continue to route via the active one? or will i need to flush all the arp tables on pc's routing behind it? or do they use the same mac address so it will be ok?

cheers

Carl

Hi Carl,

For your query if we switch off the configuration in backup router and pc are pointed towards the vip of vrrp group then no traffic disruption because Master router is alive and will be forwarding the traffic.

Yes there will be drop from 2 - 3 when Master goes down and Backup comes into picture for vrrp group and 1-2 drop when Master comes back in Master stage of vrrp group.

HTH

If helpful do rate the valuable post

Ganesh.H

carl_townshend Mon, 02/01/2010 - 08:07

hi ganeshh

can you tell me what you mean by

"Yes there will be drop from 2 - 3 when Master goes down and Backup comes into picture for vrrp group and 1-2 drop when Master comes back in Master stage of vrrp group."

by turning off the backup master function for 1 vlan, will the clients need to re arp etc? or do they still use the vip mac address, im gathering they use the vip mac address here, so switching it off should be fine?

thanks

Carl

Correct Answer
Ganesh Hariharan Mon, 02/01/2010 - 21:20

hi ganeshh

can you tell me what you mean by

"Yes there will be drop from 2 - 3 when Master goes down and Backup comes into picture for vrrp group and 1-2 drop when Master comes back in Master stage of vrrp group."

by turning off the backup master function for 1 vlan, will the clients need to re arp etc? or do they still use the vip mac address, im gathering they use the vip mac address here, so switching it off should be fine?

thanks

Carl

Carl,

I was actually means for RTO just when ever you ping the vip and master router goes down and backup takes postion of master there will 2 - 3 RTO's.

and Yes by turning off the backup routerconfigurion of vrrp in vlan they will still use the vip mac address where your Master router is active for the vlan and hence the traffic will be moving without any direuption.

Hope that clear out your query !!

If helpful do rate the valauble post

Ganesh.H

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