03-26-2021 02:08 AM - edited 03-26-2021 02:10 AM
Hello,
I search the command to know what is connected on a TRUNK port (it could be also a ACCESS port).
I need to know the IP address.
(Catalyst 2960-X / 9200L / 9300)
Regards,
Solved! Go to Solution.
03-26-2021 04:07 AM
I plan to enable CDP on all the cisco Switchs.
#Conf t
(config)#cdp run
(config)#do wr mem
(config)#end
#show cdp neighbors
03-26-2021 06:22 AM
this what I had to suggest in my original reply
if the cisco device you can do cdp neighbour
03-26-2021 02:18 AM
what is connected ?
if the cisco device you can do cdp neighbour - if the end device you need to identify with mac vendor lookup.
The access port is easy -
show mac address-table [address mac-address] [dynamic | multicast | static] [interface {ethernet slot/port | port-channel number}] [vlan vlan-id]
Then match the MAC address with IP
show ip arp | in xxxx.xxxx.xxxxx (mac address)
For the Trunk - if they are many VLAN in the Trunk allowed list - you need to trace based on the mac learning from Trunk or port-channel, go to the switch and do as suggested above process to get IP address ? (Layer 2 you get MAC address, Layer 3 you get IP address)
make sense?
03-26-2021 02:24 AM - edited 03-26-2021 02:49 AM
using with :
ping all the IP address known, from the switch, to fill the ARP Table.
show mac address-table | include Gi1/0/27
03-26-2021 03:26 AM
The proposal is not exactly what I need.
The need is to know what is the other switch (IP,MAC, HOSTNAME) connected on Trunk Port .
03-26-2021 04:07 AM
I plan to enable CDP on all the cisco Switchs.
#Conf t
(config)#cdp run
(config)#do wr mem
(config)#end
#show cdp neighbors
03-26-2021 06:22 AM
this what I had to suggest in my original reply
if the cisco device you can do cdp neighbour
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