Hello Team, I wonder if f5 is able to monitor to servers intermitently For example ; we have a pool and the pool has 4 members and f5 will take down them and up periodically example ;in 15 muntes for example; member x down and after 15 minutes member x up and after 15 minutes member x down Do you think How can we perform the monitoring ? thank you in advance.

Can you provide some more detail on the monitor type and configuration please.

Hello Stive, we want to monitor the back end servers via http monitor but as ı stayed above f5 will mark down the back end servers and 15 minutes later mark up so we will be monitor the back end servers periodically like down and 15 minutes later up and 15 minutes later down. how can we perform this via script please help me on this. thank you...

Can you post the configured send and receive strings? When the monitor marks the server(s) as down, can you check whether they are in fact responding by doing a telnet test from the BIG-IP to the relevant port and entering the send string.

f5 will mark down the back end servers and 15 minutes later mark up so we will be monitor the back end servers periodically like down and 15 minutes later up and 15 minutes later down.what are you going to do when traffic is coming but pool is down? besides external monitor, i think irule can make it too by calculating on time (e.g. mod). the following is discussion in the past. although it is not exactly what you are asking, it might be helpful. Schedule iRule https://devcentral.f5.com/community/group/aft/1179351/asg/50 Schedule an iRule for specific date/time https://devcentral.f5.com/community/group/aft/13201/asg/51

Hello, no receive string and send string with monitor you can just consider the http monitor also we don't wan to schecule any time on the irule because we just want to mark down some members of existing pool and so the other production members that are in the pool will not be affected like rejection or discarding . is that possible ? thank you

custom_extarnal_monitor

12 Replies

hooleylist
Cirrostratus
Jan 17, 2013
You could write a shell script which uses tmsh to enable/disable pool members. You could then call that shell script from an external monitor.

But as WLB says, this is a confusing request. Why would you want to manually mark a working server down on a schedule? Wouldn't this affect clients who are being load balanced to that server? Or do you want to drain the connections first? You could do this by setting the pool member status to:

Disabled (Only persistent or active connections allowed)

Aaron
waterfall_10467
Altostratus
Jan 18, 2013
Hello Aaron,

thank you for your quick reply but that is being wanted by customer so ı wonder if it is possible. of course as you said clients will be affected who are being load balanced.

sincerely yours,

Forum Discussion

custom_extarnal_monitor

12 Replies

Recent Discussions

Migration from i series 10200 with 1 child VCMP to r series 10900 series

Open Redirection Mitigation

GTM Packet Capture command

How to Implement 2 Way SSL in F5 LTM

BWC iRule