TaibC_89930
Nimbostratus
Oct 03, 2012LTM 3900 Network Failover
I am new to F5 and would appreciate some guidance, I am setting up a redundant pair of BIG IP LTM 3900s in an ACTIVE/STANDBY SETUP using Network failover.
Below are the issues I am having and what I think the solution is to each, but if anyone can suggest a recommended/best practice way I’d appreciate the help.
CURRENT BIG IP LTM setup
3 TRUNKS configured: 4 members, 2 members, 2 members
Failover type: Network Failover, LTM peers are separated by a geographically distributed LAN, cannot use Hardware failover.
Failover criteria: Using HA Groups to monitor members in TRUNKs
Trunk Threshold – 2 active, 1 active, 1 active
Active Bonus set: as without this the peers failover when a single member of the 4 link trunk goes down, even though threshold is set to 2 active members. Cannot see why this is.
Looking for a way to automatically synchronise the configs between the two peers, and have been researching SYNC-ONLY DEVICE GROUPs, but am having trouble with the implementation, is this an option on the LTM 3900?
Do I need a specific VLAN for the failover heatbeat? I have seen conflicting posts on this as some say there should be a dedicated VLAN for failover to prevent flaps, and others it isn’t necessary.
Am still looking at VLAN failsafe, but I’m trying to get the basic interface failover working first
Is there a way to use a floating management IP address, so using HTTPs to this address always takes me to the active LTM device, cannot see how to set a floating Self IP for use just on for management.
These forums have been a great help, so thanks in advance.