I had a rough day today. We just had what looked like a broadcast storm. All the uplink interfaces of the access switches were error disabled so I had to get in by console one by one and bring up the uplink interfaces. When everything settled, I looked into my core switches and got only one entry on the log of each switch:
Primary switch: 000502: Jul 8 18:46:28: %HSRP-4-DUPADDR: Duplicate address xxx.xxx.10.161 on Vlan10, sourced by zzzz.zzzz.zzzz.
Secondary switch: 000502: Jul 8 18:46:28: %HSRP-4-DUPADDR: Duplicate address xxx.xxx.10.162 on Vlan10, sourced by yyyy.yyyy.yyyy
The sourced mac address corresponds to the mac address of the switches so I'm kind of stumped as to what caused the duplicate IP address. Any ideas?
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...