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"VIST peer MAC learnt on non-IST..." error message

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Information

 
Title"VIST peer MAC learnt on non-IST..." error message
Symptoms
Recurring log message visible in the logs. Instead of "MltId" there be also "port"
 
DYNAMIC CLEAR GlobalRouter COP-SW INFO VIST peer mac 99:99:aa:77:ee:00 on VID 99 is learnt on non-IST MltId 99, Pointing record back to IST port.Total Peer Mac Move Count: 999

 
Environment
  • VSP 8600/8800 series
  • VOSS
Cause
Loop in the network caused by using IST link bundle along with non-IST link bundle. As STP is by default enabled on non-IST bundles and disabled on IST bundles, it cannot detect loop and disable one of the ports.
Resolution
Remove the non-IST bundle, there is no reason to use non-IST and IST bundles together. 
If you wish a higher redundancy, extend the IST bundle, use more links.
Additional notes

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