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problem with microsoft NLB

Stefano Colombo
Regular Advisor

problem with microsoft NLB

HI ,

I'm trying to configure two HP 5500 switches to support microsoft NLB in multicast mode .

The Windows guest are running on Vmware servers .


As per Vmware BP we are trying to configure NLB in multicast mode but still cannot succeed .

can anyone share some help with an example configuration ?


We are using two HP 5500 configured in VRRP ( not irf unfortunately )

The two are connected with a BAG os 2 10Gb ports .


Vmware hosts are connected to each of the switch


There are several VLANs

VLAN 200 VM server guest ( this is the VLAN of the NLB server )

VLAN 100 clients



any help is appreciated