Troubleshooting Network Boot Problems
308614-14.20 Rev 00 B-9
Use the Packet Capture utility to view incoming or outgoing BootP or TFTP
packets and isolate errors to a specific router in terface. This utility is available
through the Technician Interface on routers running BayRS Version 7.80 or later.
See Using Technician Interface Software for instructions on how to use Packet
Capture. See Configuring SNMP, BootP, DHCP, and RARP Services for a
description of BootP packets.
Use Packet Capture as follows:
1. Test the BootP server’s next-hop router in the path to the AN/ANH or
ARN router.
2. Test the upstream router’s interface to the AN/ANH or ARN router.
3. Test the upstream router’s interface to the next-hop router.
4. Test the interfaces that receive and forward the BootP and TFTP packets
of the routers between the AN/ANH or ARN router and the next-hop
router.
5. Continue testing each router in the path until you isolate the problem
interface.
Guidelines for Using a LAN Protocol AnalyzerSee the following guidelines when you use a LAN protocol analyzer:
•If the netboot is failing, connect the analyzer to the BootP server interface to
determine whether it is receiving and responding to BootP and TFTP requests.
To read the ASCII translation, view the BootP reply packets for the
configuration file path name in hexadecimal mode.
Note: The instructions that follow assume that BayRS Version 7.80 or later is
running on all routers in the path between the AN/ANH or ARN router and the
BootP server.
Note: The LAN protocol analyzer does not decode all of the vendor tag fields.