user manual

13-18
Cisco Aironet 1200 Series Access Point Software Configuration Guide
OL-2159-05
Chapter 13 Diagnostics and Troubleshooting
Using Command-Line Diagnostics
:eap_diag2_on
Use the :eap_diag2_on command to display the packet contents of each authentication step for client
devices authenticating through the access point. The packet contents for one authentication step might
look like this example:
EAP: Sending Identity Request
00c15730: 01 00 00 28 01 21 00 28 01 00 6e 65 74 77 6f 72 *...(.!.(..networ*
00c15740: 6b 69 64 3d 45 41 50 33 2c 6e 61 73 69 64 3d 45 *kid=EAP3,nasid=E*
00c15750: 41 50 33 2c 70 6f 72 74 69 64 3d 30 *AP3,portid=0....*
The first group of characters in the packet contents (00c15730, for example) is the hexadecimal address
of the memory buffer that contains the packet. The middle group of characters (01 00 00 28 01 21 00 28
01 00 6e 65 74 77 6f 72, for example) is the packet contents in hexadecimal format. The last group of
characters (*...(.!.(..networ*, for example) is an ASCII representation of the packet contents.
For information on interpreting the content of packets sent between the access point and the RADIUS
server, refer to the Internet Society’s RFC 2865. This document is available at
http://www.armware.dk/RFC/rfc/rfc2865.html as well as on many other websites. The IEEE’s 802.1x
authentication standard helps define the content of packets sent between client devices and the access
point and is available to IEEE members at http://www.ieee.org.
Follow the steps in the “Entering Diagnostic Commands” section on page 13-16 to open the CLI and
enter the :eap_diag2_on command.
:vxdiag_arpshow
Use the :vxdiag_arpshow command to display the access point’s ARP table. The ARP table might look
like the following example:
LINK LEVEL ARP TABLE
destination gateway flags Refcnt Use Interface
----------------------------------------------------------------
10.84.139.129 00:05:31:d3:c0:9 405 1 0 emac0
----------------------------------------------------------------
These are descriptions for each column in the ARP table:
• Destination—IP address of the host entry
• Gateway—MAC address of the destination
• Flags—see Table 13-2 for a list of flags
• Refcnt—the number of hosts referencing this address
Table 13-2 Flag Definitions
Flag Value Definition
0x1 Route is usable
0x2 Destination is a gateway
0x4 Host of specific routing entry
0x8 Host or net unreachable
0x10 Created dynamically (by redirect)
0x20 Modified dynamically (by redirect)
0x40 Message confirmed