WebOct 4, 2010 · Note :- Red result is the duplicate address of two routers and "0" indicates duplicate address OR use "show cdp neighbors detail" Example :- Switch#show cdp neighbors detail Device ID: Router Entry address (es): IP address : 10.1.1.20 Platform: cisco C1841, Capabilities: Router Interface: FastEthernet0/1, Port ID (outgoing port): … WebThe Layer 2 switch passively learns MAC addresses by listening. It will have learned the MAC addresses of these two endpoints. If by some chance both of these machines claim to have duplicate MAC …
switch - Same MAC on different interfaces - Network Engineering …
WebMar 14, 2007 · changing the mac-address will not help. You have to change the ip address. You first have to find out what/where is the other device. For that you can follow the L2 path. Go the switch to which the router is connected on fast0/0. If you don't know the switch, try 'sho cdp nei'. Once on the switch, check the mac-address with the command … WebMar 16, 2024 · Cisco Community Technology and Support Security Network Access Control Duplicate MAC address Dot1x and MAB 2690 25 7 Duplicate MAC address Dot1x and MAB Go to solution cdiaz Beginner Options 03-16-2024 05:40 AM Hi, I have problems with clients authenticated with ISE Dot1x MAB. The client MAC appears on two different … picture of triangle shape
Hyper-V, Port-Security and duplicate MAC addresses - Cisco
WebMay 11, 2010 · In this case: 1) We do a 'sho mac address-table and see that the device with the mac address in question lives on one port, port 1/0/x. 2) We apply mac port security for this exact same mac address to the same port it is already attached to. switch … WebJun 5, 2013 · I think most of the bigger switch vendors have management tools that can help you detect duplicate MAC addresses. 3Com has something called Transcend Status Watch . If you have Dell switches, look into OpenManage Network Manager . flag Report Was this post helpful? thumb_up thumb_down OP Chris128 thai pepper Aug 21st, 2010 … WebFound duplicate mac-address 00D1.5935.06D3 I'm not sure where this mac-address has been kept. switch0#show mac-address-table Mac Address Table Vlan Mac Address Type Ports 1 0061.47b5.bd97 STATIC Fa0/4 and switch running config shows no mac configured: switch0#show running-config Building configuration... Current configuration : 1146 bytes picture of trich