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Knowledge Base > Basic Configuration > How to I enable CDRouter's built-in SNMP trap receiver?

How to I enable CDRouter's built-in SNMP trap receiver?

CDRouter can display SNMP traps using both the -decode option and the -pt (or -ptc) option. To create a trap receiver, configure a staticHost entry for the trap receiver that is configured on the device.

For example, if the device was configured to send traps to 192.168.1.254, the following would be added to your CDRouter configuration file: 

testvar staticHost 192.168.1.254

CDRouter will answer any ARP requests for staticHost entries, allowing the SNMP trap to be sent. With the -decode option, the SNMP trap message will be displayed in the packet decode. With the -pt option, the trap message will be logged.

NOTE: The IP address for a staticHost must be on the same subnet as the LAN configuration (testvar lanIp). 

PACKET-IN(eth1): received eth proto type 0800
ETH: ---- Ethernet Packet (length = 171) ----
ETH: 
ETH: Source                     = 00:06:25:c2:1e:31
ETH: Destination                = 00:c0:95:e0:2f:f0
ETH: Type                       = IPv4 (0x0800)
ETH:
IPv4: ---- IPv4 Header ----
IPv4: 
IPv4: Version                   = 4
IPv4: Header Length             = 5
IPv4: TOS byte                  = 0x00
IPv4: Total Length              = 157
IPv4: ID                        = 0x0000
IPv4: Flags/Offset              = 0x0000
IPv4:   Don't Fragment          = 0
IPv4:   More Fragments          = 0
IPv4:   Offset                  = 0
IPv4: TTL                       = 150
IPv4: Protocol                  = UDP (0x11)
IPv4: Checksum                  = 0xa000
IPv4: Src                       = 192.168.1.1
IPv4: Dest                      = 192.168.1.254
IPv4:
UDP: ---- UDP Packet ----
UDP: 
UDP: Source Port                = 1050 
UDP: Destination Port           = 162 (SNMP Trap)
UDP: Length                     = 137
UDP: Checksum                   = 0xcb27
UDP:
SNMP: ---- SNMP Trap Packet ----
SNMP: 
SNMP: 192.168.1.1TRAP, SNMP v1, community 
SNMP:   .1.3.6.1.4.1.3955.2.2.1 Enterprise Specific Trap (1) Uptime: 0:01:18.44
SNMP:   .1.3.6.1.4.1.3955.1.1.0 = STRING: "@in UDP from 192.168.200.254:5000 to 192.168.200.2:1201."
SNMP: 
SNMP:
SNMP: ---- End SNMP Trap Packet ----