Thanks, rely the ID (ifIndex ) is change when the interface is down. this case occur on linux machine and more some others device.
Em 23 de abril de 2012 06:04, Joel Hansell <joel.hans...@gmail.com> escreveu: > Hi, > > By "ID number", I assume that you mean the ifIndex? > > The ifIndex is not guaranteed to be persistent over reboots, and this > is a quite common occurence. The relevant RFC text is below: > > "Its value ranges between 1 and the value of ifNumber. The > value for each interface must remain constant at least from > one re-initialization of the entity's network management > system to the next re-initialization." > > In other words, the ifIndex numbering of the interfaces is only > guaranteed to persist until the machine is re-booted. > But surely, if you want to know which interface is which, you can just > inspect the ifDescr field instead? > > As an aside, some systems seem to be able to have ifIndex persistence > enabled, like some Cisco equipment: > http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080134eec.shtml > > Regards, > Joel Hansell > > On Mon, Apr 23, 2012 at 4:47 AM, Usuário do Sistema <maico...@ig.com.br> > wrote: >> Hello, I have a CentOS 5.4 Linux machine and I'm monitoring by snmp it >> interfaces ethernet. but, when the machine it is restart ID number >> snmp that's interfaces are change. >> >> for exemplo when the linux machine is with ID 3 on interface eth1 and >> it is reset so it come up with a different ID for exemplo 2 for eth1. >> >> so I wonder why happen ? it's normal ? it's possible set a ID value >> for every interface ? >> >> if is change the ID number for each interface so stop my monitoring >> because my snmp software read by interface ID. >> >> >> thanks >> >> ------------------------------------------------------------------------------ >> For Developers, A Lot Can Happen In A Second. >> Boundary is the first to Know...and Tell You. >> Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! >> http://p.sf.net/sfu/Boundary-d2dvs2 >> _______________________________________________ >> Net-snmp-users mailing list >> Net-snmp-users@lists.sourceforge.net >> Please see the following page to unsubscribe or change other options: >> https://lists.sourceforge.net/lists/listinfo/net-snmp-users > > ------------------------------------------------------------------------------ > For Developers, A Lot Can Happen In A Second. > Boundary is the first to Know...and Tell You. > Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! > http://p.sf.net/sfu/Boundary-d2dvs2 > _______________________________________________ > Net-snmp-users mailing list > Net-snmp-users@lists.sourceforge.net > Please see the following page to unsubscribe or change other options: > https://lists.sourceforge.net/lists/listinfo/net-snmp-users ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
