F5 LTM VIP/STP Problem

Hamish,

 

 

Thank you for replying to this post. The only Etherchannel configurations I have are between switches only. The devices E-01/E-02 are Layer 3 Etherchannels to another network. In the diagram provided, we have a Layer 2 trunk between two Catalyst 3560E-48 switches. We have no 802.3ad configurations between the F5 LMTs or NIC Teams. It is just a single cable to each switch for redundancy purposes.

 

 

I am not a fan of HP Teaming. I couldn't agree more with you about HP teaming and I have seen a number of issues with those causing loops as you described. We do not have 802.3ad/LACP configured because we only have one NIC per switch and the 3560Es are not stackable. This is why we are using one NIC to each switch with TLB. What I did notice is that when we change the Load Balance Method on the teaming group to Destination IP, it works. Really not sure why and to make that change on all server scares me without understanding why. No other Load Balance Method works. I have changed the 3560E load-balancing methods, but it had no effect and I have left it at src-dst-ip.

 

 

The LTMs connect to the switch ports on 37 & 38 for both switches and I have those set for autonegotiation of speed/duplex.

 

 

I have two DNS servers and one connects to SW1/SW2. They are on the same VLAN as all the other servers and F5. The DNS servers can resolve internal/external names including the VIPs. It's just with the teamed NICs Team Type Selection of automatic/TLB and Load Balacing Method to Automatic it cannot reach the VIPs/LTM web management. If I change the Load Balancing Method to Destination IP, I can access the VIPs/LTM web management.

 

 

Jeremy