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New Member

Linkdown trap not working


I am trying to monitor 2621 with IOS 12.1(5)T but i discoverd that it doesn't send a link down trap.

i checked the configuration and it looks fine (It is working on other routers).

Could you help me (Configuration is attached).

Tzachi Slav


Version 12.1

no service single-slot-reload-enable

service timestamps debug uptime

service timestamps log uptime

service password-encryption


hosname R_X


no logging rate-limit


ip subnet zero



no ip finger

ip domain name

ip name-server 222.x.x.240



decnet routing 1.504

decnet node-type are


call rsvp-sync


interface loopback0

ip address 200.x.x.x.255.255.0


interface fastethernet 0/0

description LAN

ip addess 222.222.x.x.255.255.0

duplex auto

speed auto

decnet cost 1

ip rsvp bandwidth 24 24


interface serial 0/0

description WAN

mtu 1000

bandwidth 64

ip address 222.x.x.3

ip tcp header-compression

no ip mroute-cache

dcnet cost 2

fair-queue 64 16 1

mop enabled

ip rtp header-compression

ip rsvp bandwidth 24 25


router eigrp 1


no auto-summary

no eigrp log-neighbor-changes


ip classless

no ip http server

decnet host MRRTR4 1.504


snmp-server engineID local X

snmp-server community public RO

snmp-server community password RW

snmp-server trap-source loopback0

snmp-server enable traps snmp authentication linkdown linkup coldstart

snmp-server enable traps hsrp

snmp-server enable traps syslog

snmp-server host 222.x.x.222 password xxx config envmon syslog





Cisco Employee

Re: Linkdown trap not working

If you enable snmp debugs do you see it attempt to send the snmp link down trap?

If so, what is the network path to the trap receiver? Any chance it is getting dropped after leaving this device?

New Member

Re: Linkdown trap not working


Just try:

snmp-server host password

I think the 'tty config envmon syslog' parameters are maybe stopping the link up/down traps.

Cisco Employee

Re: Linkdown trap not working

Sorry I missed that...your config will not send snmp linkup/down to the host based on the paramaters you added to the host command