i understand trap is enabled by default (because it is in /etc/alertd/alert.conf). trap destination is configured under snmp menu in gui or sys snmp traps in tmsh.
configuration
root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list sys snmp traps
sys snmp {
traps {
i192_168_207_28_1 {
community public
host 192.168.207.28
}
}
}
trace
[root@ve11a:Active:In Sync] config tcpdump -nni 0.0 -s0 -X port 162
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on 0.0, link-type EN10MB (Ethernet), capture size 65535 bytes
05:58:55.048979 IP 172.28.24.11.34285 > 192.168.207.28.162: V2Trap(292) .1.3.6.1.2.1.1.3.0=17381040 .1.3.6.1.6.3.1.1.4.1.0=.1.3.6.1.4.1.3375.2.4.0.11 .1.3.6.1.4.1.3375.2.4.1.1="Pool /Common/foo member /Common/200.200.200.101:80 monitor status up. [ /Common/http: up ] [ was unchecked for 0hr:0min:11sec ]" .1.3.6.1.4.1.3375.2.4.1.2="/Common/200.200.200.101" .1.3.6.1.4.1.3375.2.4.1.3="80" .1.3.6.1.6.3.1.1.4.3.0=.1.3.6.1.4.1.3375.2.4 out slot1/tmm1 lis=
0x0000: 0ffd 0800 4500 0153 0000 4000 4011 e5ad ....E..S..@.@...
0x0010: ac1c 180b c0a8 cf1c 85ed 00a2 013f 553d .............?U=
0x0020: 3082 0133 0201 0104 0670 7562 6c69 63a7 0..3.....public.
0x0030: 8201 2402 0406 5258 1702 0100 0201 0030 ..$...RX.......0
0x0040: 8201 1430 1006 082b 0601 0201 0103 0043 ...0...+.......C
0x0050: 0401 0936 b030 1906 0a2b 0601 0603 0101 ...6.0...+......
0x0060: 0401 0006 0b2b 0601 0401 9a2f 0204 000b .....+...../....
0x0070: 3081 9006 0b2b 0601 0401 9a2f 0204 0101 0....+...../....
0x0080: 0481 8050 6f6f 6c20 2f43 6f6d 6d6f 6e2f ...Pool./Common/
0x0090: 666f 6f20 6d65 6d62 6572 202f 436f 6d6d foo.member./Comm
0x00a0: 6f6e 2f32 3030 2e32 3030 2e32 3030 2e31 on/200.200.200.1
0x00b0: 3031 3a38 3020 6d6f 6e69 746f 7220 7374 01:80.monitor.st
0x00c0: 6174 7573 2075 702e 205b 202f 436f 6d6d atus.up..[./Comm
0x00d0: 6f6e 2f68 7474 703a 2075 7020 5d20 205b on/http:.up.]..[
0x00e0: 2077 6173 2075 6e63 6865 636b 6564 2066 .was.unchecked.f
0x00f0: 6f72 2030 6872 3a30 6d69 6e3a 3131 7365 or.0hr:0min:11se
0x0100: 6320 5d30 2606 0b2b 0601 0401 9a2f 0204 c.]0&..+...../..
0x0110: 0102 0417 2f43 6f6d 6d6f 6e2f 3230 302e ..../Common/200.
0x0120: 3230 302e 3230 302e 3130 3130 1106 0b2b 200.200.1010...+
0x0130: 0601 0401 9a2f 0204 0103 0402 3830 3017 ...../......800.
0x0140: 060a 2b06 0106 0301 0104 0300 0609 2b06 ..+...........+.
0x0150: 0104 019a 2f02 0401 0501 0000 0100 ..../.........
05:58:55.050190 IP 172.28.24.11.34285 > 192.168.207.28.162: V2Trap(154) .1.3.6.1.2.1.1.3.0=17381040 .1.3.6.1.6.3.1.1.4.1.0=.1.3.6.1.4.1.3375.2.4.0.135 .1.3.6.1.4.1.3375.2.4.1.1="SNMP_TRAP: Virtual /Common/bar has become available" .1.3.6.1.6.3.1.1.4.3.0=.1.3.6.1.4.1.3375.2.4 out slot1/tmm1 lis=
0x0000: 0ffd 0800 4500 00c7 0000 4000 4011 e639 ....E.....@.@..9
0x0010: ac1c 180b c0a8 cf1c 85ed 00a2 00b3 54b1 ..............T.
0x0020: 3081 a802 0101 0406 7075 626c 6963 a781 0.......public..
0x0030: 9a02 0406 5258 1802 0100 0201 0030 818b ....RX.......0..
0x0040: 3010 0608 2b06 0102 0101 0300 4304 0109 0...+.......C...
0x0050: 36b0 301a 060a 2b06 0106 0301 0104 0100 6.0...+.........
0x0060: 060c 2b06 0104 019a 2f02 0400 8107 3042 ..+...../.....0B
0x0070: 060b 2b06 0104 019a 2f02 0401 0104 3353 ..+...../.....3S
0x0080: 4e4d 505f 5452 4150 3a20 5669 7274 7561 NMP_TRAP:.Virtua
0x0090: 6c20 2f43 6f6d 6d6f 6e2f 6261 7220 6861 l./Common/bar.ha
0x00a0: 7320 6265 636f 6d65 2061 7661 696c 6162 s.become.availab
0x00b0: 6c65 3017 060a 2b06 0106 0301 0104 0300 le0...+.........
0x00c0: 0609 2b06 0104 019a 2f02 0401 0501 0000 ..+...../.......
0x00d0: 0100 ..