BladeSystem - General
1745793 Members
3884 Online
108722 Solutions
New Discussion

Re: MS multicast NLB with HP VC Flexfabric

 
ialyoshin
Occasional Collector

MS multicast NLB with HP VC Flexfabric

Hi,

the customer has problems with VC and MS NLB. Did anybody faced similar problem?

 

Environment:

-          Bladesystem c7000, BL460 g8 servers, VC FlexFabric 10Gb/24-port (4.10 f/w) connected to Cisco 6500 (VSS), VMware vSphere 5.1 cluster inside chassis.

-          Active-Active VC Config  (Dual SUS), LAGs of 2 links to Cisco6500 (LACP), now only 1 VC active for diagnostics

-          2 x Windows 2008R2 VMs in NLB cluster (multicast mode) in VLAN X (inside chassis)

-          Terminal server VMs in VLAN Y (inside chassis)

 Traffic VLAN X - VLAN Y is routed by Cisco 6500, recommended settings for NLB (static arp etc) are done

 

Problem:

When 2 links in LAG from VC active traffic does not go from Terminal server to NLB cluster vip (session drops etc).

For clients outside c7000 chassis everything is ok.

When only 1 link is active from VC everything is ok (does not depend on which link is active).

Only multicast traffic is affected.

1 REPLY 1
MartynCoup
Occasional Collector

Re: MS multicast NLB with HP VC Flexfabric

So sorry to dig up such an old post, but I have a scenario which is very similar.

 

The exceptions to this are, customer is using Hyper-V and traffic in the whole VLAN was experiencing issues until the servers configured in the NLB were shutdown.

 

Can anyone provide any guidance on where we go with this?