We have to find out the port to which new device is connected. There is some confusion to find out the port, where we are making a connection.
This command can be implemented on all switch models
Now, simply plug & unplug the cable connected to the device. we will see the logs generated by itself, showing the particular port on which this activity has been done
In Cisco Nexus
” NETWORK CONNECTIVITY ”
Nexus 6K1 (contains two modules, SUP card & I/O module of ports with 10Gig capacity)
N6K1# sh mod
Mod Ports Module-Type Model Status
1 48 Norcal 64 Supervisor N6K-C6001-64P-SUP active *
2 4 Nexus 4xQSFP Ethernet Module N6K-C6001-M4Q ok
Nexus 6K1 is connected to four switches, 2K (Model: 2248) (also called Fabric Extender) to extend the I/O ports of 6K1. 2k switches can be accessed & managed by connected Nexus, 6K switches.
N6K1# sh fex
FEX FEX FEX FEX
Number Description State Model Serial
101 FEX101 Online N2K-C2248TP-E-1GE SSI17300716
103 FEX103 Online N2K-C2248TP-E-1GE SSI17260ECL
105 FEX105 Online N2K-C2248TP-E-1GE SSI172708KT
107 FEX107 Online N2K-C2248TP-E-1GE SSI17340DAM
In this problem is, we are connecting to the 10Gig ports os the Nexus 6k1 switch
Ideally, the connection should be made on the ports of the connected 2K switches
So to find out, where we are making the connection, we applied the
command: switch# terminal monitor
& found we are connecting on Nexus 6K1, which is not required
So, finally disconnected & connected to the Nexus 2k switch ports & received logs as per connection made, as monitor terminal command has been enabled. That’s how, we confirmed the right port.
Server is not able to communicate with the Switch
Take the server ip
On Switch, apply command: sh ip arp <server ip> , to learn MAC address of switch from connected Switch port.
If you are not getting MAC address from above command, It means there is some issue
Now, We need to find out the exact switch port, where server is connected.
So, apply command: switch#terminal monitor
& Plug/Unplug the server end cable, now switch will show logs of required Switch port
On Switch port, check if there is some error
Another option, change the cable
One more option, change connection to another port of switch & configure new switch port as required