Common causes of ISDN's being raised every minute are:
CDP, SNMP/ICMP polling from network management stations (OV, Tivoli, etc) Local Broadcast traffic (NT/Netbios etc), SYSLOG/Accounting, SNMP linkstate traps, and running routing protocols on the dialer interface.
You should be able to see the cause of a dial session by doing show dialer on the initiating end.
Adjust the dialer-list so that you don't consider broadcasts interesting. Disable CDP, switch snmp link state traps off on all ISDN lines.
Repeat the show dialer each time the link is raised and determine if the dial cause is expected (interesting) and if not adjust the dial-list ACL, or otherwise adjust your configuration to remove the cause until the problem is solved.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...