Hi Bill Fenner, Thanks a lot. I am very grateful to the portal for keeping us more knowledgeable and interest on snmp alive.
Regards, Pushpa.T On Tue, Aug 27, 2019 at 7:20 PM Bill Fenner <fen...@gmail.com> wrote: > On Fri, Aug 23, 2019 at 12:19 PM Pushpa Thimmaiah < > pushpa.thimma...@gmail.com> wrote: > >> Hi All, >> >> I would like to understand messages exchanged between manager and agent >> during snmpv3-inform. >> Following is my understanding >> Msg1. Agent to manager : Request for engineID >> Msg2. Manager to Agent : Response with engineID >> Msg3. Agent to Manager : Send snmpv3 trap to manager >> Msg4. Manager to Agent : Send ACK to agent on authenticating and >> receiving snmpv3 trap >> >> *Query:* >> Varbinds in Message #3 and #4 are same. Varbinds of >> Message#3(informRequest) is trap, but why manager sends same varbinds back >> to Agent in Message#4 (get-response) >> > > See section 4.2.7 of RFC3416: > https://tools.ietf.org/html/rfc3416#section-4.2.7 > > Upon receipt of an InformRequest-PDU, the receiving SNMP entity > determines the size of a message encapsulating a Response-PDU with > the same values in its request-id, error-status, error-index and > variable-bindings fields as the received InformRequest-PDU. > > > Presumably the intent of including the varbinds in the response is to > allow the originator of the inform to ensure that the complete message was > received, if it cares to do that much validation. > > Bill > >
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