All,

I'm setting up a snmptrapd farm for our network, and plan to use a 
network load balancer in front of the snmptrapd processes to provide HA 
and load balancing. The one question that came up from my network 
engineers is how snmptrapd determines the IP address of the agent 
sending the TRAP or INFORM message, and how it determines how to send 
the INFORM reply.

Is snmptrap using information sent within the SNMP PDU, or is it using 
information from the IP transport itself? This is important because the 
load balancer we are using doesn't do packet translation, and as such, 
the TRAPS will be coming to the snmptrapd from the load balancers, at 
least as far as the IP layer knows. Basically, we are not planning on 
using NAT in the load balancer.

Will this work? Is there something I can do to make sure it works?

Marc Zampetti

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