Using the interface parameter on the clear arp command is the optimum solution for this but it is available in recent releases and not in older releases. I am not sure whether it is supported in this particular release or not.
If the interface parameter is not supported in this version of code, an alternative would be to shut/no shut the layer 3 interface. This effectively clears the ARP cache for only that interface. But it is a potentially disruptive thing to do (impacting routing logic as well as ARP). I would be inclined to just clear the entire ARP table if the interface parameter is not available.
The impact of clearing the ARP entries is that the switch must rebuild the entries in the ARP table. There will be some increase in traffic on the interface as the ARP requests and sent and replies are received, and some (probably small) increase in CPU utilization to process the ARP responses. I would expect that for most switches and for most interfaces the impact of clearing ARP would be pretty small.
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...