Statu s Displ ays 20-15
frames. Besides the encap sulatio n infor matio n, the main dif ference b etween BAN and
BNN LLC2 frames is that BAN sends the MAC addresses across the WAN. BAN is
usually used for connectivity to AS/400 hosts only.
Test Fram e Exa mpl es
LLC2 802.5 SRB (BAN):
0016 (0027) 0300800080C 200091040444400000008C0000000222282700004F3
03 = Control
00 = PAD
80 = NLPID
00 80 C2 = OUI
00 09 = PID
10 = PAD
40 = Frame Control
444400000008 = DMAC
C000000002222 = SMAC
8270 = RI F routi n g cont rol fi eld (2 by tes)
00 = DSAP
04 = SSAP
F3 = Test (BF = XID, 7F = SAB ME, 73 = UA, 53 = DISC, 1F = DM, 97 = FRMR)
LLC2 802.3 TB (bridged):
0016 (0025) 0300800080C2000722220000001002000000444400030004F3
03 = Control
00 = PAD
80 = NLPID
00 80 C2 = OUI
00 07 = PID
222200000010 = DMAC
020000004444 = SMAC
0003 = Frame length
00 = DSAP
04 = SSAP
F3 = Test (BF = XID, 7F = SAB ME, 73 = UA, 53 = DISC, 1F = DM, 97 = FRMR)
Bridge d Prot ocol Da ta Unit ( BPDU) frame (s ee 802 .1d Sp a nning Tree Alg orithm ):
0016 (0043) 0300800080C2000E000000000180000060BB0039080000
Packet is the same as any 802.3 TB packet, except that a different PID is used.
BPDUs use a 00 0E PID.
RIP (routed IP) packet traced on DLCI 16:
0016 (0054) 03CC450000340066000014119E4D0202020202020201020802
080020EE930201000000020000030000000000000000000000
000000
03 = Q.92 2 c ontro l byte
CC = NLPID for IP
45 = IP version/header length
00 = IP type of service
00 34 = total length of packet in hex
00 4E = Identifier
00 00 = F lag s/f rag men t offs et