Re: What's the "agent addr" for ? Is it mandatory ?
Dave Shield <[email protected]>
| Newsgroups | gmane.network.net-snmp.user |
|---|---|
| Message-ID | <[email protected]> |
2009/1/21 Ragnar Moller <[email protected]>: > Our problematic traps from a natted ip, 12.155.xxx.xxx which shops up as the > source on the IP level. > But inside the snoop (snp layer) there is a field called "agent addr", this fiels > is different from the one above, showing a local lan address 192.168.xxx.xxx You may need to investigate whether your firewall can support NAT mangling within the SNMP packets. See RFC 2962 for some more information about this. > - What is the real purpose of the field "agent addr" >From RFC 1157 - section 4.1.6: The form of the Trap-PDU is: Trap-PDU ::= : agent-addr -- address of object generating NetworkAddress, -- trap > - Is the field mandatory For SNMPv1 trap PDU's yes. > - Is there a difference between snmpv1 and snmpv2c regarding this field The SNMPv2-Trap2-PDU (as used by both SNMPv2c and SNMPv3) does *not* include an agent-addr field. This is specific to SNMPv1 traps. However SNMPv2 notifications may include a "snmpTrapAddress" varbind, containing the agent-addr field value. This is specifically for use when receiving SNMPv1 traps and forwarding them as SNMPv2 notifications. > - In general, should there not be a configuration for the NMS to use one > or the other a) use address in IP layer or b) use address in SNMP layer > - In particular is an NMS surch as HPOV capable of this That's a question for the HPOV people. Our project is more aimed at SNMP agents and simple/dedicated applications. We don't pretend to provide a full NMS. Dave ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Net-snmp-users mailing list [email protected] Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users