20-16 Sm artSwit ch 1800 4.0 U ser Gui de, Rev 01
14 = Time To Live ( 1 4 sec o nd s/ h op s )
11 = Protocol (hex 11 is 17 UDP, hex 01 is 01 ICMP, hex 06 is 06 TCP, etc…)
9E 65 = IP header checksum
02 02 02 02 = IP source address
02 02 02 01 = IP destination address
0208 = UDP source port (520)
0208 = UDP destination port (520)
0020 = UDP len gth (20 he x is 32 decima l )
EE93 = UDP header checksum
02 = RIP Command byte (R es ponse)
01 = RIP Version 1
00 00 = must be zero
03000000 = IP address (reporting route to network 3.0.0.0)
00000000 = must be zero
00000000 = must be zero
00000000 = Metric (hops 1-15; note that 16 is unreachable)
ARP (bridged IP) Request packet traced on DLCI 16:
0016 (0076) 0300800080C20007FFFFFFFFFFFF0080C7193D800036AAAA03
0000F8080600010800060400010080C7193D80C6554ABC0000
00000000C6554A015F4C5445585400000400000000000000A029
03 = Q.922 con t ro l byt e
00 = Pad byte
80 = SNA P N LPID f or a bridge d 802. 3 fram e
0080C2 = OUI
0007 = PID
FFFFFF FFFFFF = Destination MAC address
0080C7193D80 = Source MAC address
0036 = length of packet in hex (54 bytes follow)
AAAA03 = SNAP Header
0000F8 = Protocol ID (SNAP OUI will see 000000 or 00000C)
0806 = Ethert yp e (ARP )
0001 = Hardware (Eth ern e t 10MB )
0800 = Protocol = Et hertyp e (D O D-I P)
06 = Hardware address length
04 = P rotoco l addr ess l ength
0001 = Op Cod e (1 = ARP request, 2 = ARP reply, 3 = RARP reque st, 4 = RARP
repl y)
0080C7193D80 = Sender's hardware address (MAC address)|
C6554ABC = Sender ' s prot ocol ad dress ( IP addr ess)
000000000000 = Target hardw are add re ss (MA C add res s)
C6554A01 = Target pr otoc ol a ddre ss (IP add ress)
The rest i s E thern et padd ing.