Using SNMP to Find a Port Number from a MAC Address on a Catalyst Switch
This document describes how to use Simple Network Management Protocol (SNMP) to obtain the port number on a Cisco Catalyst switch from which you know the MAC address.
Issue the following: mdscisco07#sh mac address-table interface gigabitEthernet 1/19 Unicast Entries vlan mac address type protocols port ——-+———+——–+———+———– 5abcd.1234.wxyzdynamic ip,ipx GigabitEthernet1/19 HTH Leave a Reply You must belogged into post a comment....
A sample MAC address is CC:46:D6:00:b3:81. The first six digits tell you that this is a Cisco device, while the last six digits are the NIC number. Note that the colon is replaced by a period in Cisco systems. To find the MAC address of a device, simply type “ipconfig/all”...
5 years ago I check the MAC address table on the access switch to get the MAC address on the switch port, and then look in the ARP table on the default gateway device for that VLAN to see the IP associated with the MAC. LikeReply...
Find IP Address by MAC Address Find item in zip file without extracting find most current file from today and yesterday Find multiple strings in text files powershell Find oldest file created on a given date. Find out what primary dns server is being used by powershell in the domain? Find...
Getting Event ID 4199: IP conflicts with a MAC address of another machine Getting time from pool.ntp.org getting windows service status from registry google chrome not trust the self-signed internal certificate GPO Errors 1112, 101, 103, 108 Grant Permissions to Create Users in Active Directory...
1. On switches, assuming one of its ports has no host connected now, is there a command to show the MAC address for the last host that is connected to the switch? Or figure out when is the last time a host is connected to the port? You could configure of "MAC address Notifications...
Basically, on the same subnet arp will be used. So a local broadcast message is sent out asking for for '10.0.0.1' or whatever to respond with their mac address. That then goes into the requester's arp table. Thereafter packets would be routed with the resolved mac address. If its out...
# Helper variable that is a dict of MAC address keys to client information values matching_dict = {} for (mac, client) in zip(clients_macs, clients): matching_dict[mac] = client # Find matches between clients on switch to master input list matches = set(clients_macs).intersection(macs)...