require 'snmp'
host = ARGV[0] || 'localhost'
SNMP::Manager.open(:Host => "localhost") do |manager|
manager.walk("ifTable") { |vb| puts vb }
end
SNMP::Manager.open(:Host => host) do |manager|
manager.walk(["ifIndex", "ifDescr"]) do |ifIndex, ifDescr|
puts "#{ifIndex} #{ifDescr}"
end
end