From: allboutcisco (frenzeus@streamyx.com)
Date: Tue Aug 22 2006 - 14:59:45 ART
Hi Ivan,
I believe by removing the global traps, no traps will be generated at all,
even if snmp-server hosts were configured with specific traps to send to.
Tried that in my lab.
Thanks.
-K
----- Original Message -----
From: "Ivan" <ivan@iip.net>
To: <ccielab@groupstudy.com>; "allboutcisco" <frenzeus@streamyx.com>
Sent: Wednesday, August 23, 2006 12:31 AM
Subject: Re: Sending specific SNMP traps to NMS host
> Once you have this configured. HSRP and OSPF traps will send to all
> snmp-hosts. Try to remove this.
>> snmp-server enable traps hsrp
>> snmp-server enable traps ospf
>
>
> On Tuesday 22 August 2006 19:50, allboutcisco wrote:
>> Hi group,
>>
>> I've been doing some verification on my config for snmp. I configured 2
>> snmp host on the router to forward traps to, specifically 1 which
>> receives
>> only hsrp and the other no specific traps specified. Then i enable traps
>> globally for hsrp & ospf. I have always thought or at least assumed that
>> by
>> specifying "snmp-server host 141.1.77.100 version 2c CISCO hsrp" that
>> the
>> router will only send hsrp-related traps to the NMS 141.1.77.100; but it
>> proves otherwise when i did a debug snmp packet.
>>
>> My config as follows:
>> snmp-server host 141.1.7.100 CISCO tty
>> snmp-server host 141.1.77.100 version 2c CISCO hsrp
>> snmp-server enable traps hsrp
>> snmp-server enable traps ospf
>>
>> My findings are:
>> When an event takes place for hsrp & ospf, snmp traps are generated,
>> queued
>> & finally sent (well at least from what the debugs say) to both
>> 141.1.7.100
>> & 141.1.77.100. To me, it doesn't seem that by tying in a specific trap
>> to
>> the snmp host ONLY that specific trap will be sent to it.
>>
>> My debug output (debug snmp packets & debug ip packet detail)
>>
>> Rack1R3#
>> *Mar 1 15:02:59.707: SNMP: Queuing packet to 141.1.7.100
>> *Mar 1 15:02:59.707: SNMP: V1 Trap, ent cHsrpMIBNotificationPrefix, addr
>> 141.1.37.3, gentrap 6, spectrap 1 cHsrpGrpEntry.15.3.1 =
>> NO_SUCH_INSTANCE_EXCEPTION
>> *Mar 1 15:02:59.779: SNMP: Queuing packet to 141.1.77.100
>> *Mar 1 15:02:59.783: SNMP: V2 Trap, reqid 22, errstat 0, erridx 0
>> sysUpTime.0 = 925530
>> snmpTrapOID.0 = cHsrpMIBNotifications.1
>> cHsrpGrpEntry.15.3.1 = NO_SUCH_INSTANCE_EXCEPTION
>> *Mar 1 15:02:59.959: SNMP: Packet sent via UDP to 141.1.7.100
>> *Mar 1 15:02:59.959: IP: tableid=0, s=141.1.37.3 (local), d=141.1.7.100
>> (FastEthernet0/0), routed via FIB *Mar 1 15:02:59.959: IP: s=141.1.37.3
>> (local), d=141.1.7.100 (FastEthernet0/0), len 93, sending *Mar 1
>> 15:02:59.959: UDP src=52433, dst=162
>> Rack1R3#
>> *Mar 1 15:03:00.035: SNMP: Packet sent via UDP to 141.1.77.100
>> *Mar 1 15:03:00.035: IP: tableid=0, s=141.1.37.3 (local), d=141.1.77.100
>> (FastEthernet0/0), routed via FIB *Mar 1 15:03:00.035: IP: s=141.1.37.3
>> (local), d=141.1.77.100 (FastEthernet0/0), len 118, sending *Mar 1
>> 15:03:00.035: UDP src=58747, dst=162
>> Rack1R3#
>>
>>
>> Appreciate any inputs on this. Thanks.
>>
>> -K
>>
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>
> --
> Ivan
>
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