Troubleshooting
12-25
12
Sample Token Ring Output
The following is a sample of Token Ring output.
The first six bytes are the destination MAC address. The next six bytes are the
source MAC address, followed by 0 to 18 bytes of source routing information.
The Logical Link Control (LLC) information header follows the source MAC
address or the source routing information if it is present. SNA data is carried in
the information field of the LLC frames. For more information about MAC and
LLC frame formats and for a description of protocols and source routing, refer
to Appendix D, “IBM Token Ring Concepts." The Sunscope utility captures all
the data traffic for the IBM Token Ring network interface being monitored.
If Sunscope shows no traffic or only data originating from the local ring
station, the Sun PU2.1 SNA Server is not receiving any data. Either there is a
physical connection problem or the SNA host has not activated your link
station. Note that the Sun PU2.1 SNA Server transmits route determination
first, followed by XID polling after the route is determined.
The sample Token Ring output is continued below. Comments are in italics.
(C) Copyright 1997 Sun Microsystems, Inc.
*-----> scope log data for line: /dev/nit <-----*
#
sunPU21 is sending out route determination
#
frame to locate the Host-IBM Token Ring
#
Interface device
S:4000123456784000 246835790000f3
..... ....`..3
S:4000123456784000 246835790000f3
..... ....`..3
S:4000123456784000 246835790000f3
..... ....`..3
#
Not found on local ring, check others
S:400012345678c000 2468357982700000 f3
.....{....`b...3
S:400012345678c000 2468357982700000 f3
.....{....`b...3
S:400012345678c000 2468357982700000 f3
.....{....`b...3
# Back to local ring
————————————— Frame content in HEX ————————————————><———— EBCDIC ——————>
R:4000246835794000 1234567804040404 2c00020000010380.....` ...........
00e6c5d3c3d6d4c5 40e3d640e3c8c540 c9c2d440e3c5e2e3.WELCOME TO THE
Содержание SunLink SNA 9.1 PU2.1
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