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Author Topic: installing 8812LX into 8800  (Read 1953 times)

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Offline ch0mps

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installing 8812LX into 8800
« on: November 18, 2013, 09:07:21 PM »
We ran into a problem after installing a 8812 module. Some of the traffic on the other modules started to drop and loose connectivity to the devices directly connected to the 8800. What are some precautions when installing an 8812. It should be a simple process but I keep running into this issue. We are currently using 7.1.3 .Any suggestions are much appreciated.

Offline Telair

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Re: installing 8812LX into 8800
« Reply #1 on: November 18, 2013, 11:56:37 PM »
Two things maybe to think about...

1) I recall that the 8812LX blades were over-subscribed blades by 4:1.  Are you loading the links off the card too heavily due to the over-subscription issue?  Ports 1-4, 5-8 and 9-12 each share 10Gig of bandwidth off the backplane of the 8800.  So you can push at maximum 2.50Gb/port, or only a single port to 10Gig per lane before a packet has to drop somewhere.  Maybe look at the load on your links and see if you can redistribute them better to avoid overloading a single lane?

2) Do you have a IST cluster of 8800's doing this?  If so, are the IST links between 8800's 10Gig links or just 1Gig links?  If you have 10Gig ports you need to be running 10Gig IST links between the units.

That's what I can think of off the top of my head.

Offline Michael McNamara

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Re: installing 8812LX into 8800
« Reply #2 on: November 19, 2013, 09:54:25 AM »
Hi ch0mps and welcome to the forums!

You say you started dropping traffic on other modules outside of the 8812XL?

Is this a newer ERS 8600/8800 chassis? What slot did you place the card in?

I could only guess that something isn't right with the module and it's dragging down your CPU/SF which is impacting traffic elsewhere.

Anything of interest in the logs?

show log file tail


show sys perf

Good Luck!
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Offline ch0mps

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Re: installing 8812LX into 8800
« Reply #3 on: January 08, 2015, 06:07:13 PM »
Thanks for the response. We were oversubscribing the ports. Once we moved them to the appropriate ports, everything worked great.

Thanks again. It took me a while to respond due to work.