Forum Discussion

ales_2527's avatar
ales_2527
Icon for Nimbostratus rankNimbostratus
Dec 17, 2007

enabling/disabling node/member takes a lot of time

Hi,     I have to SNMP-trap receivers in a pool behind F5 bigip.   If I disable one node or pool member, traps are still coming for a minute or two. Sometimes even up to 10minutes or more, d...
management
monitoring
hoolio's avatar
hoolio
Icon for Cirrostratus rankCirrostratus
Dec 31, 2007
I would guess that enabling 'LB datagram' on the UDP profile for this virtual server would fix this. With this option disabled (as it is by default), LTM considers UDP packets coming from the same source IP and port as part of a 'connection'. So when you disable a node, 'persistent connections' will still be allowed.

 

 

SOL7535 (Click here) states:

 

 

 

The Datagram LB option, which is disabled by default, specifies that the system load balances UDP traffic packet-by-packet and does not treat UDP packets from the same source and port as part of a connection. This setting overrides the default behavior of the UDP profile. The following option is available in BIG-IP LTM version 9.4 and later.

 

 

 

 

I'm fairly certain this option has been around for much longer than 9.4. SOL3605 (Click here) states it was added in 9.0.3.

 

 

Aaron