Hi, The Ruby SNMP library isn't as smart as Net-SNMP at formating output because it doesn't have any knowledge of the underlying MIB. The actual format of the MAC address is just 6 bytes (octets) representing each digit of the MAC. Try vb.value.inspect to see what I mean. You need to do your own translation. Try this instead of vb.value.to_s: vb.value.unpack("H2H2H2H2H2H2").join(":") You could even add a to_mac method to the OctetString class (untested). module SNMP class OctetString def to_mac raise "Invalid MAC" unless self.length == 6 self.unpack("H2H2H2H2H2H2").join(":") end end end Hope that helps. Cheers, Dave On Jun 25, 7:18 am, jc <jack.ciaba... / gmail.com> wrote: > Hi, > > I'm using SNMP module into a simple script. I would like retrieve > interfaces MAC > addresses by using oid "1.3.6.1.2.1.2.2.1.6" : > > + using snmpwalk it works fine > > snmpwalk -v 1 -r 1 -t 2 -c public 127.0.0.1 .1.3.6.1.2.1.2.2.1.6 > IF-MIB::ifPhysAddress.1 = STRING: 0:10:83:fd:dd:67 > > + using ruby > > ifTable_columns = [ "1.3.6.1.2.1.2.2.1.6", ] > SNMP::Manager.open(:Host => "#{host}", :Version => :SNMPv1, :Community > => 'public') do |manager| > manager.walk(ifTable_columns) do |row| > row.each { |vb| puts "#{vb.name.to_s} #{vb.value.to_s} > #{vb.value.asn1_type}" > end > end > > 1.3.6.1.2.1.2.2.1.6.1 ýÝg OCTET STRING > > It shows ýÝg as MAC address. How can I fix it? > > Thank you very much, > Jc > > -- > Posted viahttp://www.ruby-forum.com/.