clabshark.md

clabshark

I wrote the following little bash function to simplify remote capture:

### start wireshark and listening on a containerlab device
function clabshark {
    if [ $### -ne 3 ]; then
      echo "Usage: clabshark <username@containerlab_address> <container_name> <interface_name>"
      return
    fi
    ssh $1 "sudo ip netns exec $2 tcpdump -U -nni $3 -w -" | wireshark -k -i -
}

Usage

Here is an example of sniffing on XR-1 GigabitEthernet0/0/0/0:

clabshark user@clab-server clab-hawkv6-XR-1 Gi0-0-0-0

Adding to .bashrc

I suggest adding it to the .bashrc file or including it into your own .bash_functions file and including this code in your .bashrc: Don't forget to reload your .bashrc with the command source .bashrc.

### Load bash_functions when starting bash shell
if [ -f ~/.bash_functions ]; then
    . ~/.bash_functions
fi

Don't forget to reload your .bashrc with the command source .bashrc.

After activating it, you can use it easily.