Decided to scan a couple of new switches today. They are Cisco Catalyst 9300 (L3) and Cisco Catalyst 9200L (L2). I don't think the ARP table or MAC address table is being queried properly, as I can't see any info. When I connect to other models, they results are ok.
Could it be an issue with this switch model? And is there any way to debug or see what's going on?
Thank you for the output file. We have checked it, and this switch seems to only list a few MAC addresses, namely:
.18.104.22.168.22.214.171.124.126.96.36.199.188.8.131.52.175,OctetString, 78 BC 1A 0D 2D AF
.184.108.40.206.220.127.116.11.18.104.22.168.22.214.171.124.176,OctetString, 78 BC 1A 0D 2D B0
.126.96.36.199.188.8.131.52.184.108.40.206.220.127.116.11.175,OctetString, 78 BC 1A 16 A0 AF
.18.104.22.168.22.214.171.124.126.96.36.199.188.8.131.52.176,OctetString, 78 BC 1A 16 A0 B0
These are associated with Port-channel1 and Port-channel2 (#144 and #145). Unfortunately they are the only MAC addresses the switch exposes via SNMP. Though I am not sure if there is an IOS setting affecting that.