Source IP for SNMP traps

[Bartek]

Hi Guys,

I can't find it anywhere - what is the source IP for SNMP traps when you configure the network to "Default"? I'm having a HA setup of two 12.1.5 devices.

[Mayur_Sutare]

Hello,

What do you see under " show running-config sys snmp trap-source"

F5 can use different outgoing interfaces to send snmp traps. You can even modify and configure source interface as per your requirement for snmp traps. Please refer below article.

https://support.f5.com/csp/article/K91608713

Hope it helps!

Mayur

[Samir]

Did you try tcpdump to check source ip?

tcpdump -i any -nn port snmp

​hope it will work for you..

[Bartek]

The source is set to "default" in trap configuration - can't really find a definition of "default".

Tcpdump was one of my first ideas, however hard to track the source when traps are not firing that often.

[Mayur_Sutare]

 ,

Do you have any specific host route for SNMP server or is it using default route to reach it from F5? I think, unless SNMP server is a connected network, it would use the interface to go to server where the default route is pointed.

Mayur