Server Infrastructure: Microsoft Server 2012 Hyper-V installed on UCS Blade Servers. Network infrastructure is Nexus1000v for HyperV - FI62xx (endhost mode) uplinked to Catalyst 4510 Core Switch.
Plan: Deploy Exchange 2010 NLB with two servers, each with one network card, NLB mode: IGMP multicast
- Catalyst: static ARP for Cluster VIP
- Nexus1000v: disabled IGMP snooping on servers VLAN
All configuration is acting strangely, it works for some clients but not for others, if we stopped one node in NLB, more things stops working but some works fine.
Nexus1000v configuration guide describes only NLB Unicast scenario.
I suppose that something is missing in configuration.