Help, quick Q?

Beany

Hi,

I'm troubleshooting on a cisco router as our network is very slow. We have 3 fast Ethernet connected and 1 dialer(ADSL). The show ip int brief command tells me what is up and down but no IP addresses of each interface apart from the Dialer.

How do i find out the mac addresses connected to each interface? I can use the 'show arp' command but it doesnt provide interface information.

thanks

APA

You have a small amount of interfaces and I'm assuming you want to find out the bia(local mac) of each interface. Use the following:

R1#show interfaces | inc Eth|bia
FastEthernet0/0 is administratively down, line protocol is down
Hardware is Gt96k FE, address is c406.fb26.0000 (bia c406.fb26.0000) <-- mac of Fa0/0
FastEthernet0/1 is administratively down, line protocol is down
Hardware is Gt96k FE, address is c406.fb26.0001 (bia c406.fb26.0001) <-- mac of Fa0/1
R1#