Re: SNMP Confusion

this is a good one to play with the debug and let the router show you what
it thinks about these settings, see below:

Router#sh debugging
SNMP:
  SNMP packet debugging is on

Router#sh ip int br
Interface IP-Address OK? Method Status
Protocol
FastEthernet0/0 172.16.1.1 YES manual up
up
FastEthernet0/1 unassigned YES unset administratively down
down

Router#sh run | s snmp
snmp-server enable traps snmp linkdown linkup
snmp-server enable traps syslog
snmp-server host 172.16.1.61 version 2c PUBLIC

Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int f0/1
Router(config-if)#no shut
Router(config-if)#
*Mar 1 03:32:56.499: %LINK-3-UPDOWN: Interface FastEthernet0/1, changed
state to up
*Mar 1 03:32:56.535: SNMP: Queuing packet to 172.16.1.61
*Mar 1 03:32:56.539: SNMP: V2 Trap, reqid 14, errstat 0, erridx 0
 sysUpTime.0 = 1277653
 snmpTrapOID.0 = ciscoSyslogMIB.2.0.1
 clogHistoryEntry.2.12 = LINK
 clogHistoryEntry.3.12 = 4
 clogHistoryEntry.4.12 = UPDOWN
 clogHistoryEntry.5.12 = Interface FastEthernet0/1, changed state to up
 clogHistoryEntry.6.12 = 1277650
*Mar 1 03:32:57.499: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/1, changed state to up
*Mar 1 03:32:57.539: SNMP: Queuing packet to 172.16.1.61
*Mar 1 03:32:57.539: SNMP: V2 Trap, reqid 15, errstat 0, erridx 0
 sysUpTime.0 = 1277753
 snmpTrapOID.0 = ciscoSyslogMIB.2.0.1
 clogHistoryEntry.2.13 = LINEPROTO
 clogHistoryEntry.3.13 = 6
 clogHistoryEntry.4.13 = UPDOWN
 clogHistoryEntry.5.13 = Line protocol on Interface FastEthernet0/1, changed
state to up
 clogHistoryEntry.6.13 = 1277750
*Mar 1 03:32:57.563: SNMP: Queuing packet to 172.16.1.61
*Mar 1 03:32:57.563: SNMP: V2 Trap, reqid 16, errstat 0, erridx 0
 sysUpTime.0 = 1277756
 snmpTrapOID.0 = snmpTraps.4
 ifIndex.2 = 2
 ifDescr.2 = FastEthernet0/1
 ifType.2 = 6
 lifEntry.20.2 = up

THEN change the SNMP-SERVER settings, no more UPDOWN messages:

Router(config)#snmp-server host 172.16.1.61 version 2c PUBLIC config
Router(config)#do sh run | s snmp
snmp-server enable traps snmp linkdown linkup
snmp-server enable traps syslog
snmp-server host 172.16.1.61 version 2c PUBLIC config

Router(config)#do sh ip int br
Interface IP-Address OK? Method Status
Protocol
FastEthernet0/0 172.16.1.1 YES manual up
up
FastEthernet0/1 unassigned YES unset up
up
Router(config)#int f0/1
Router(config-if)#shut
Router(config-if)#
*Mar 1 03:34:38.363: %LINK-5-CHANGED: Interface FastEthernet0/1, changed
state to administratively down
*Mar 1 03:34:39.363: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/1, changed state to down
Router(config-if)#no shut
Router(config-if)#
*Mar 1 03:35:35.935: %LINK-3-UPDOWN: Interface FastEthernet0/1, changed
state to up
*Mar 1 03:35:36.935: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/1, changed state to up

ANOTHER CHANGE and TEST with key WORD SYSLOG and syslog traps enabled:

Router#sh run | s snmp
snmp-server enable traps syslog
snmp-server host 172.16.1.61 version 2c PUBLIC syslog
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#exit
Router#
*Mar 1 03:42:06.759: %SYS-5-CONFIG_I: Configured from console by console
*Mar 1 03:42:06.807: SNMP: Queuing packet to 172.16.1.61
*Mar 1 03:42:06.807: SNMP: V2 Trap, reqid 25, errstat 0, erridx 0
 sysUpTime.0 = 1332679
 snmpTrapOID.0 = ciscoSyslogMIB.2.0.1
 clogHistoryEntry.2.21 = SYS
 clogHistoryEntry.3.21 = 6
 clogHistoryEntry.4.21 = CONFIG_I
 clogHistoryEntry.5.21 = Configured from console by console
 clogHistoryEntry.6.21 = 1332676
*Mar 1 03:42:07.059: SNMP: Packet sent via UDP to 172.16.1.61

Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int f0/1
Router(config-if)#shut
Router(config-if)#
*Mar 1 03:42:43.383: %LINK-5-CHANGED: Interface FastEthernet0/1, changed
state to administratively down
*Mar 1 03:42:43.427: SNMP: Queuing packet to 172.16.1.61
*Mar 1 03:42:43.427: SNMP: V2 Trap, reqid 26, errstat 0, erridx 0
 sysUpTime.0 = 1336341
 snmpTrapOID.0 = ciscoSyslogMIB.2.0.1
 clogHistoryEntry.2.22 = LINK
 clogHistoryEntry.3.22 = 6
 clogHistoryEntry.4.22 = CHANGED
 clogHistoryEntry.5.22 = Interface FastEthernet0/1, changed state to
administratively down
 clogHistoryEntry.6.22 = 1336338
*Mar 1 03:42:43.679: SNMP: Packet sent via UDP to 172.16.1.61
*Mar 1 03:42:44.383: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/1, changed state to down
*Mar 1 03:42:44.431: SNMP: Queuing packet to 172.16.1.61
*Mar 1 03:42:44.431: SNMP: V2 Trap, reqid 27, errstat 0, erridx 0
 sysUpTime.0 = 1336442
 snmpTrapOID.0 = ciscoSyslogMIB.2.0.1
 clogHistoryEntry.2.23 = LINEPROTO
 clogHistoryEntry.3.23 = 6
 clogHistoryEntry.4.23 = UPDOWN
 clogHistoryEntry.5.23 = Line protocol on Interface FastEthernet0/1, changed
state to down
 clogHistoryEntry.6.23 = 1336438
*Mar 1 03:42:44.683: SNMP: Packet sent via UDP to 172.16.1.61

On Sat, Oct 3, 2009 at 5:38 AM, Adrian <ccie2323_at_gmail.com> wrote:

> Hi thanks for the reply,
> So does it mean that configuration 1 will
> send both mac-notification and linkup and linkdown traps while
> configuration
> 2 will only send mac-notification traps?
>
>
> *Configuration 1*
> snmp-server enable traps mac-notification
> snmp-server enable traps snmp linkup linkdown
> snmp-server host 172.16.1.61 traps version 2c public
>
> *Configuration 2*
> snmp-server enable traps mac-notification
> snmp-server enable traps snmp linkup linkdown
> snmp-server host 172.16.1.61 traps version 2c public mac-notification snmp
>
>
> On Sat, Oct 3, 2009 at 4:32 AM, Usain TheThunderbolt <
> fordownloadsccie_at_gmail.com> wrote:
>
> > They will accomplish the same thing , the second config will restrict
> > the traps sent to the management station to just the ones specified in
> > the snmp-server command . This prevents the sending of all traps in
> > case other ones have been enabled
> >
> > On 10/2/09, Adrian <ccie2323_at_gmail.com> wrote:
> > > Hi Experts,
> > > I'm abit confused with regards configuration of snmp
> > traps.
> > > I would like to know the difference between the below 2.
> > >
> > > *Configuration 1*
> > > snmp-server enable traps mac-notification
> > > snmp-server enable traps snmp linkup linkdown
> > > snmp-server host 172.16.1.61 traps version 2c public
> > >
> > > *Configuration 2*
> > > snmp-server enable traps mac-notification
> > > snmp-server enable traps snmp linkup linkdown
> > > snmp-server host 172.16.1.61 traps version 2c public mac-notification
> > snmp
> > >
> > >
> > > Blogs and organic groups at http://www.ccie.net
> > >
> > > _______________________________________________________________________
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> > --
> > Warm Regards ,
> > Usain TheThunderbolt
> >
> > CCNAX3 (Voice , Security , Wireless )
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>

-- 
Garry L. Baker
"There is no 'patch' for stupidity." - www.sqlsecurity.com
Blogs and organic groups at http://www.ccie.net