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Is it possible to upgrade the MFSC2 without downtime

We have a cat 6500 running in hybrid mode. With two MFSC2 in high-availability mode. We currectly run on the MFSC2 IOS ver 12.1(22)E. We are going to upgrade to 12.1(23)E4. I was wondering can I do that without downtime using the following this procedure:

1. place new IOS in bopotflasg of both MFSC2

2. change the bootsystem command on the standby MFSC2

3. reboot the standby MFSC2

4. wait for full reboot and sync of standby MFSC2

5. switch between active and standby MFSC2

6. chnage boot system command on standby MFSC2

Would this work? Or is there an issue running two MFSC2s in HighAvaiol mode it the IOSsses aren't the same.

2 REPLIES
Cisco Employee

Re: Is it possible to upgrade the MFSC2 without downtime

If the IOS versions are different on the two MSFCs, High Availability/SRM will break.

In short, a 'hitless' IOS upgrade is not possible.

HTH,

Bobby

*Please rate helpful posts.

New Member

Re: Is it possible to upgrade the MFSC2 without downtime

How long would aproxx a none High availability switchover take?

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