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CSS 11503 VIP Redundancy - Taking down the Master

Hi

I've inherited a pair of CSS 11503 in a VIP Redundancy Master - Backup pair, and need to add a 16 port ethernet expansion card into each them.

These switches are of course in a production envoiroment.

Can somebody tell the the corret way in which I should go about this upgrade, if possible with no disruption to the customers service.

My thinking is to shutdown the Backup, install the card. Power it back up.

Shutdown the Master, install the card and power it back up.

This all sounds too simple and your input would be greatly appreciated.

The Master has a priority of 101 preempt

The Backup has no priority set and no preempt

Thanks in advanced

Jason

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Re: CSS 11503 VIP Redundancy - Taking down the Master

if you shutdown the active, there will be a few seconds delay before the backup takes over during which client will have connection issues.

I would suggest to change the priority of the backup to a value higher than the master before shutting down the master.

Like this, you get a smooth failover.

Gilles.

2 REPLIES
Cisco Employee

Re: CSS 11503 VIP Redundancy - Taking down the Master

if you shutdown the active, there will be a few seconds delay before the backup takes over during which client will have connection issues.

I would suggest to change the priority of the backup to a value higher than the master before shutting down the master.

Like this, you get a smooth failover.

Gilles.

New Member

Re: CSS 11503 VIP Redundancy - Taking down the Master

Thank you Gilles

I wonder if you could answer another question alog the same lines.

I've taken a look at the configs on the Primary CSS and the interesting lines are as follows:-

!************************* INTERFACE *************************

interface 1/1

bridge vlan 10

description "FEP Network (Internet)"

interface 1/2

bridge vlan 20

description "FES Network"

!******** CIRCUIT **************************

circuit VLAN10

ip address 10.35.160.3 255.255.255.0

ip virtual-router 10 priority 101 preempt

ip redundant-interface 10 10.35.160.254

ip redundant-vip 10 10.35.160.7

ip redundant-vip 10 10.35.160.6

ip redundant-vip 10 10.35.160.18

ip redundant-vip 10 10.35.160.20

ip redundant-vip 10 10.35.160.10

ip redundant-vip 10 10.35.160.31

ip redundant-vip 10 10.35.160.32

ip redundant-vip 10 10.35.160.33

ip critical-service 10 upstream-downstream

circuit VLAN20

ip address 10.35.32.1 255.255.255.0

ip virtual-router 20 priority 101 preempt

ip redundant-interface 20 10.35.32.6

ip critical-service 20 upstream-downstream

My servers are pointing to the 10.35.32.6 address as the Default Gateway.

My Firewalls are pointing to the 10.35.160.3 address.

Am I missing something here or is this correct as I would have thought they should point to the 10.35.160.254.

Nay help would be greatly appreciated

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