
Troubleshooting
303509-A Rev 00 C-13
7.
Use Packet Capture to save data packets for later analysis.
The Technician Interface Packet Capture tool allows you to filter, send,
capture, and view packets in hexadecimal format. You can save the data in a
Network General Sniffer format file, transfer the file to a network analyzer,
and use the analyzer to parse the data. We recommend that you use Packet
Capture to capture data generated on remote router, save it in Network
General Sniffer format files, and use TFTP or FTP to transfer the files to a site
where you can open the files with a network analyzer.
For detailed instructions on using Packet Capture, refer to the BayRS guide
Troubleshooting Routers.
8.
Take a snapshot of your network.
You should periodically gather and save the forwarding and routing tables
maintained by each router. You can use the Statistics Manager to do this.
This information can help you troubleshoot future problems. For example,
you may find the next-hop address to a given destination does not match that
in a table you saved previously. From this, you might conclude that there may
be a problem with the connection to the node that should be the next hop
address.
You can use the Statistics Manager to save tables to files as follows:
a.
Use the Statistics Manager Screen Manager tool to add the routing
tables in the Default Screen List window to the Current Screen List
window.
b.
For each routing table:
• Use the Launch Facility tool to display it.
• Choose File > Save to save the contents of it to a formatted ASCII
file.
You can use any editor to read the ASCII files, or print and organize them for
later reference.
A map of your network configuration is another useful resource to have
available for troubleshooting. Include information about the hardware, the
software, and the cables you are using. When troubleshooting a problem,
compare the next hop on the network map to that of the forwarding table
associated with the problem protocol.
Comentarios a estos manuales