Hi Cory,
I think the key piece of info you may be missing is the need to split the command output by newline breaks:
set ARP [split [exec "show ip arp | i Internet"] "\n"]
This will create a list out of the command output where each line of the command output is an element in the list. That way when you do the foreach on $ARP, you are not operating on each individual piece of the command output but on each line of the command output. So then you could then combine the lindex commands to extract the IP address and mac addresses in one fell swoop:
foreach line $ARP {
puts "[lindex $line 1] [lindex $line 3]"
}
To further drive home the point, try these examples and compare the output:
set ARP [exec "show ip arp | i Internet"]
foreach element $ARP {
puts $element
}
set ARP [split [exec "show ip arp | i Internet"] "\n"]
foreach element $ARP {
puts $element
}
Note that I have not tested any of this on an actual IOS device but I'm fairly certain splitting the output by newline and processing the output by lines rather than by space separated pieces should be closer to what you want if I understood your question correctly.
Mike
