Re: Agent Address in Trap Message is not as expected
Bill Fenner <[email protected]>
| Newsgroups | gmane.network.net-snmp.user |
|---|---|
| Message-ID | <[email protected]> |
On Jan 14, 2012, at 4:02 AM, Dave Shield <[email protected]> wrote: > On 11 January 2012 09:13, <[email protected]> wrote: >> It is found that NET-SNMP Agent sets the first UP and RUNNING interface IP >> address as the AgentAddress in the trap message send from the Agent to the >> SystemManager, instead of the IP address of the actual interface that is >> connected to the SystemManager. > > [snip] > >> snmptrapd (NET-SNMP Version: 5.3.1) captures the trap message send from the >> Agent to the SystemManager using the below command. snmptrapd runs on the >> monitoring machine, for e.g SystemManager. > > Which version of snmpd are you using? > If that is also 5.3.1, can you please try with the current version. > > I've a feeling that this behaviour has been addressed sometime in the last > few years, so you might find a newer version of the agent works better. No, it still uses get_myaddr(), which really inefficiently discovers the first up interface. There's a really nice trick (open a UDP socket, connect() it, then use getsockname() ) to figure out the outgoing address, but I couldn't figure out how to fit that in with the transport abstraction -- who says the transport even has an IP address? You can set the address explicitly with the following lines in snmpd.conf: [snmp] clientaddr x.x.x.x:0 v1trapaddress x.x.x.x (The second one is obviously only relevant to SNMPv1 traps, but that is also the code that uses get_myaddr().) Bill > > Dave > > ------------------------------------------------------------------------------ > RSA(R) Conference 2012 > Mar 27 - Feb 2 > Save $400 by Jan. 27 > Register now! > http://p.sf.net/sfu/rsa-sfdev2dev2 > _______________________________________________ > 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 ------------------------------------------------------------------------------ RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2 _______________________________________________ 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