Some "S" build had the commands but they weren't universally implemented until 12.3.
Interesting that you have had switches crash due to memory usage. I've personally never run across a memory use-induced crash since back in the days of Cisco 7000 routers (with token ring, FDDI, source route bridging and IOS 10.x!).
The crashes were cause by "improper" configurations.
Between others, the switches were sending SNMP informs to 3 snmp servers. On a period where those servers were disconnected for maintenance, the switches could not receive SNMP response to the informs...eventually the switch memory was exausted at it failed to allocate memory for other processes like "spanning-tree".
hint: On Layer2 topologies make sure to implement features like "loop guard"
I was not expecting this at all... From that day forward I decided to harden configurations as much as can.
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...