SNMP - sending traps to specific hosts

This was an issue I ran into awhile ago. I was trying to send BGP traps to one host, and PIM traps to another. As you can see below, BGP traps were getting sent to both hosts when I used version 1.

When I had version 2c specified, traps were only sent to the host configured for BGP. I do not know if this is difference in the protocol, but it is something you may want to be aware of if you need to send traps to different hosts.

Version 1, traps get sent to both hosts:

R1#sho run | inc snmp
snmp-server enable traps bgp
snmp-server enable traps pim
snmp-server host 2.2.2.2 public  bgp
snmp-server host 3.3.3.3 public  pim

R1#clear ip bgp *
R1#
00:11:49: %BGP-5-ADJCHANGE: neighbor 172.12.14.4 Down User reset
00:11:49: SNMP: Queuing packet to 2.2.2.2
 00:11:49: SNMP: V1 Trap, ent bgp, addr 172.12.12.1, gentrap 6, spectrap 2 
 bgpPeerEntry.14.172.12.14.4 = 00 00  
 bgpPeerEntry.2.172.12.14.4 = 1
00:11:49: SNMP: Queuing packet to 3.3.3.3
00:11:49: SNMP: V1 Trap, ent bgp, addr 172.12.13.1, gentrap 6, spectrap 2 
  bgpPeerEntry.14.172.12.14.4 = 00 00  
 bgpPeerEntry.2.172.12.14.4 = 1
00:11:49: SNMP: Packet sent via UDP to 2.2.2.2
00:11:49: SNMP: Packet sent via UDP to 3.3.3.3

Version 2c, traps get sent to one as desired:

R1#sho run | inc snmp
snmp-server enable traps bgp
snmp-server enable traps pim
snmp-server host 2.2.2.2 version 2c public  bgp
snmp-server host 3.3.3.3 version 2c public  pim

R1#clear ip bgp *
R1#
00:13:09: %BGP-5-ADJCHANGE: neighbor 172.12.14.4 Down User reset
R1#
00:13:09: SNMP: Queuing packet to 2.2.2.2
00:13:09: SNMP: V2 Trap, reqid 21, errstat 0, erridx 0 
 sysUpTime.0 = 78967 
  snmpTrapOID.0 = bgpTraps.2 
 bgpPeerEntry.14.172.12.14.4 = 00 00  
 bgpPeerEntry.2.172.12.14.4 = 1
00:13:09: SNMP: Packet sent via UDP to 2.2.2.2
R1#