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Troubleshooting Routers
B-52 117379-A Rev. A
An example of a hexadecimal display of a CSMA/CD frame follows.
Pkt# 10 mm/dd/yy 10:20:32.670 CSMACD 60 Rx
00000000: 01 80 c2 00 00 00 00 00 a3 00 00 0c 00 26 42 42
00000010: 03 00 00 00 00 00 80 00 00 00 a3 00 00 0c 00 00
00000020: 00 00 80 00 00 00 a3 00 00 0c 80 07 00 00 14 00
00000030: 02 00 0f 00 00 00 00 02 00 00 01 00 00 00 00 00
Protocols Supported by Synchronous, T1, E1, and MCT1 Media
The following sections identify the format and filter offsets of the protocols
supported by the synchronous, T1, E1, and MCT1 media, and show examples of
these packets:
A
TM
Bisync
hronous
F
rame Relay
F
rame Relay Switch and SMDS Switch
LAPB
P
assthru
Ba
y Networks Proprietary PPP
Standar
d PPP
SDLC
SMDS
X.25
ATM
The asynchronous transfer mode (ATM) protocol does not have a special data link
lter offset. If you configure a data link filter, set the offset to 0. The data link filter
works the same way that the MAC filter works.
An example of a hexadecimal display of an ATM packet follows:
Pkt# 20 04/23/98 09:57:29.968 ATM 548 Tx
00000000: 0c 80 00 85 00 4b 02 18 03 cc 45 00 02 14 01 10
00000010: 00 00 01 11 ed c9 64 00 00 01 64 ff ff ff 02 08
00000020: 02 08 02 00 69 c8 02 01 00 00 00 02 00 00 c0 20
00000030: de 00 00 00 00 00 00 00 00 00 00 00 00 02 00 02
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