hello does anyone have a working configuration regarding cisco sending snmp traps on tcn ? i mean the actual info that i am seeing in the sh span vlan xx detail which is like this: Number of topology changes 15 last change occurred 00:22:27 ago from GigabitEthernet0/32 i have configured the mibs from cisco, i can receive other useful info (interface up/down is working ok) but on snmp-server enable traps bridge, when i generate a tcn i receive: Subject: trap received from <UNKNOWN>: SNMPv2-SMI::mib-2.17.0.2 Host: <UNKNOWN> (UDP: [10.255.10.222]:64858) DISMAN-EVENT-MIB::sysUpTimeInstance 0:3:55:38.13 SNMPv2-MIB::snmpTrapOID.0 SNMPv2-SMI::mib-2.17.0.2 SNMPv2-SMI::enterprises.9.9.82.1.11.4.1.1.1 1 IF-MIB::ifName.10132 Gi0/32 Host: <UNKNOWN> (UDP: [10.255.10.222]:64858) DISMAN-EVENT-MIB::sysUpTimeInstance 0:3:55:38.14 SNMPv2-MIB::snmpTrapOID.0 SNMPv2-SMI::mib-2.17.0.2 SNMPv2-SMI::enterprises.9.9.82.1.11.4.1.1.0 0 IF-MIB::ifName.10132 Gi0/32 the test switch is 3560G and the i use snmptrapd from a fedora thanks Bogdan