Hello Daniel,

yes, I did!

Robin

Hi Daniel,

you are right, the debug messages do show on a second telnet session! Weird, but appropriate for now.

I am after these messages, occuring exactly every minute:

<189> FEB 15 19:44:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925461 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:44:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925460 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:44:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925459 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:44:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925458 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:44:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925457 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:44:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925456 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:44:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925455 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:44:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925454 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:43:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925087 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:43:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925086 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:43:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925085 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:43:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925084 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:43:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925083 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:43:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925082 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:43:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925081 %% Foreign pdu on interface Te2/0/9
<189> FEB 15 19:43:15 10.11.44.56-1 ISDP[180647024]: isdp_txrx.c(169) 6925080 %% Foreign pdu on interface Te2/0/9

My first thoughts were to see if some debug output (debug isdp) would show some details. But nothing.

Any hint on where to look?

Thanks,

Robin

Directly connected is a PowerConnect 5548 switch. That switch itself has a few more PowerConnect 5548 connected, so there is a little tree of switches on Port Te2/0/9.

I will further investigate tomorrow.