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Author Topic: 4500 Stacks moving to new 8610  (Read 2398 times)

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Offline tren0026

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4500 Stacks moving to new 8610
« on: October 03, 2013, 12:02:13 PM »

are relocating our data center, but trying to reduce downtime. In our old DC we have an 8610 (sw: with 6 stacks (4 switches per stack) of 4526FX (sw: 5.6.1 - basic license, used to connect workstations to the network), each with a 2 port MLT connected to the 8610. We built a 2nd 8610 (sw: in the new dc and established a 4 port MLT between each 8610. What I need to do is move the 6 stacks from the old 8610 to the new 8610, then decommission the old 8610.

My thought process is to establish an IST connection between each 8610, and convert the MLTs for the 6 4526FX stacks to SMLTs, then move one SMLT connection from each stack to the new 8610, then move the 2nd SMLT connect to the new 8610, all without any downtime (if possible)

My questions are:

1) will there be any downtime to this task (converting the MLTs to SMLTs, creating the IST connection, etc)
2) can I even do this with basic licenses on the 4500s?
3) is my thought process on this a good idea? am I way off? Is there a better way?

Offline Telair

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Re: 4500 Stacks moving to new 8610
« Reply #1 on: October 03, 2013, 04:03:22 PM »
You should be able to do this without causing downtime ( maybe a few seconds here and there I would count on at least ) that anyone will notice.  I am thinking there could be a couple seconds outage when you convert the MLT to SMLT as you have to change the MLT type and if I recall, that means you have to disable to MLT for a couple seconds to change it.

No additional licenses should be needed on your 4500's.  As far as your switches are concerned, they just see it as a single MLT link and don't know any better.

Of course, just make sure your 8600's are running the same code and have the same licenses if applicable before you hook them together.

Offline TankII

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Re: 4500 Stacks moving to new 8610
« Reply #2 on: October 05, 2013, 03:14:22 PM »
It's a painless procedure to do this.  Build the IST, make sure it's running properly, assign SMLT ID's to the existing MLT and build it identically on the other 8600.  Swing whatever links you want to over to the other 8600 and verify the SMLT is running properly.  Since you have multiple links to each 8600, you need to use SMLT ID's under 32 for it to work.