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MS-NLB MAC is not shown in FDB

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TitleMS-NLB MAC is not shown in FDB
Question
Can we configure IGMP, if NLB is connected to VDS ?
Environment
  • Exos All
  • ​Summit All
  • Black Diamond 
Answer

Yes, IGMP will work with VDS if the peer device is MS NLB.


MS NLB Mac address may not appear in FDB if MS servers are configured to run in unicast mode (instead of multicast), meaning it's flooding the switch CPU.

The following article has an example on how to configure Extreme Switches in order to work with MS NLB in multicast mode:
How to configure Extreme switches to handle Microsoft Network Load Balance (MS NLB) traffic and route it properly via static ARP, static multicast FDB, and Policy Based Routing (PBR). 


 

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