Cannot add Static ARP entry to HP A5800 switch for multicast MAC - Windows 2003 NLB
Posted on 2011-10-31
We made some "basic" changes to our core network on Saturday and one of the surprising fallouts is that we can't connect to our NLB - network load balance - IP address anymore across routed vlans. We have 8-10 vlans in our network and unless I'm on the specific vlan I can't get back to the cluster IP address anymore. The rest of the vlan in question is routing into and out of the switch just fine. We are running an HP A5800 (H3C) stacked switch pair as our core networking equip.
We have had this config working fine within VMware ESXi 4.1 for the last 6 months. Our changes Saturday somehow knocked out whatever it was that made this work in the past. We've tried adding a static ARP entry but get an error that says that it's an invalid MAC. I understand that the switch supports static ARP entries for Unicast IP addresses with multicast MAC's - but it doesn't appear so. we are running Comware Software, Version 5.20, Release 1206 on the switch stack. This connects into our HP virtual connect mezzanine on an HP C7000 chassis.
Like I mentioned- this has been working fine for the last 6 months after P2V's of all of these Win2k3 terminal servers and now it's broke.