A router may announce it self with a GARP: <img width="760" alt="Screen Shot 2022-04-12 at 16 50 46" src="https://user-images.githubusercontent.com/43345270/162977661-df5d5efc-c77f-4e4f-9079-7e7760094300.png"> The code today discards these packets as errors: https://github.com/cisco-system-traffic-generator/trex-emu/blob/d15b38637e82b1e7ccc8fe2b61d421dc4ea1d4c2/src/emu/plugins/arp/arp.go#L930 These packets need to be handled better, if we don't learn from them, at least we should count them not as errors.