We are using a Catalyst 2950T to capture the traffic of our network. We set up monitor session from a source port to a destination port, where a laptop runs tcpdump. What we observed was that the tcpdump started seeing only broadcast traffic after a couple of days. Then we had to restart the switch in order to see normal (ingress/egress) traffic again. We tried to disable/enable the session, but no avail. We also tried a same set up on a Cat4006 switch (CatOS), same issue.
Does anyone know that Catalyst switch may have some limited resources for the SPAN session, and after certain number of packets, it just stops working? Is there any way to fix/workaround this issue besides restarting the switch?
We're having the same problem here with our Catalyst 4507R. This is a constant problem! We monitor a really busy port and after a certain amount of time we only receive multicast and broadcast. The only solution is to reload the switch. This is not so easy for us since it's our main distribution switch.
- Removing and re-adding the monitor session settings doesn't help.
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...