Jordan, Thinker, Steven,
Thanks for your responses. Makes more sense now! I can run my program from the console. I added the self parameter to the the chassis_id function, however I now have a problem and question regarding encoding MAC addresses for a struct. What string format am I supposed to use? Also, I think I will get rid of Scapy in my small program. Any references I can use to easily send (no need to receive) a packet with a Layer 1 and 2 only? (i.e. only Ethernet and LLDP - no need for IP, UDP, TCP etc. I wish to create something like Ethernet | LLDP msg1 | LLDP msg2 | ... | LLDP msgn) Thanks! This is what I got now: #!/usr/bin/python import scapy import struct class lldp_class: def __init__(self): self.chassis_id_tlv = None def chassis_id(self, subtype, chassis_info): if subtype == 4: chassis_data = struct.pack("!B",chassis_info) subtype_data = struct.pack("!B",subtype) self.chassis_id_tlv = subtype_data + chassis_data def __main__(): p = lldp_class() p.chassis_id(4, "01:80:C2:00:00:0E") payload = p.chassis_id_tlv ether = scapy.Ether(dst="01:02:03:04:05:06") fullpayload = ether + payload sendp(fullpayload) __main__() ____________________________________________________________________________________ Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/newmail_tools.html -- http://mail.python.org/mailman/listinfo/python-list