For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

Ev-_28244's avatar
Ev-_28244
Icon for Nimbostratus rankNimbostratus
Sep 11, 2008

VLAN Group ARP Issues

Hello all,     I have a very interesting issue with one of my configurations using an LTM. Due to some environment limitations - and timeframes, I had to resort to inserting the LTM into an...
config
design
Pavel_Sestak_69's avatar
Pavel_Sestak_69
Icon for Nimbostratus rankNimbostratus
Sep 11, 2008
It seems to me like version/revision problem - we have upgraded a lot before getting this up. I would try to get both environments to the same builds - this should help a lot. I would also try to get second switch and make group transparent (if possible) - just to check.

 

 

The question is, do You see ARP responses, where they should be? The MAC moving between VLANS could be caused by that - check switch, I have seen this (but years ago) on multihomed Sun Sparc and Cisco. In this case bridging F5 would be very confused...

 

 

We have had a lot of problems with L2 (failover bridging in early 9.x, VLAN groups of more than 2 VLANs etc.) and we are phasing out the L2 designs, however we have one last cluster in the same environment You have described - this includes 2pcs 3750 stacked, 2 pcs cluster of BIG-IP 9.4.4 Build 65.1 Final with 6 VLAN groups. It appears to be running ok for now, however we are now in process of removing that in favor of L3 design, which appears to be far more stable. I am not sure about version of IOS on 3750, but if You are interested in that I can ask the admin.