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Forum Discussion

jachbr214's avatar
jachbr214
Icon for Nimbostratus rankNimbostratus
May 19, 2008

Display mac address of connected server

Is there a quick way to find out the mac address of the connected server on each port. arp -a only shows the vlan that it is on. I would like to find the actual interface. Example what is the mac a...
management
monitoring
mkahler_108475's avatar
mkahler_108475
Historic F5 Account
May 19, 2008
I am not quite sure what you are asking. If you are looking for the MAC address associated with an interface on the BIG-IP, the bigpipe command:

 

 

bigpipe interface show all

 

 

If you are looking for MAC addresses connected downstream from the BIG-IP, I don't think there is a command to handle this.

 

 

bigpipe arp show

 

 

Will give you devices in the arp table but this is on a VLAN level. You could tcpdump on the interface and then use a program like wireshark to view the MAC addresses, but this may be tedious. Here is an example:

 

 

tcpdump -ni 1.1 -w /var/tmp/interface1_1.pcap

 

 

Please be aware the tcpdump can use resources and unfiltered captures can grow quite large. If you are only looking for MAC address, I would suggest running tcpdump on a standby BIG-IP.