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Author Topic: 8600 MLT links to Cisco 4500x  (Read 2449 times)

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Offline rmorales

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8600 MLT links to Cisco 4500x
« on: January 14, 2016, 09:38:42 AM »

I'm having an issue with creating MLT links between the 8600 and a Cisco 4500x switch.  We have 2 8600's connected through an IST Link.  There are 2 4500x switches running VSS.  We want to have a total of 8 uplink ports from the Cisco 4500.  4 going to the primary 8600 and 4 going to the secondary 8600.  I have configured the MLT's on the both 8600's and added the 4 ports to each MLT.  When we enable the four ports on the primary the trunks are fine.  When I enable a link on the secondary 8600 the ports start bouncing. 

Has anyone had any success creating MLT's between the 8600 and a cisco switch?

Offline pat2012

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Offline Michael McNamara

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Re: 8600 MLT links to Cisco 4500x
« Reply #2 on: January 16, 2016, 10:25:19 AM »
Welcome to the forums!

Thanks for the 'show tech' but it leaves a lot of information out...  you're experiencing a loop, we need to determine where the loop is. I would suggest you enable rate-limiting on the links to keep everything from falling over hard while you troubleshoot.

Show us the MLT configuration on both ERS8600s... you have SMLT enabled?  'show mlt'

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Offline rmorales

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Re: 8600 MLT links to Cisco 4500x
« Reply #3 on: January 17, 2016, 02:01:15 AM »
I have slppp enabled on the ports would I still need to cp-limit enabled?  I'm attaching the configs of our 8600s.  We are using port 1/13,1/14,1/15,1/16 on both 8600s and smlt 21 on both.