Information Technology Reference
In-Depth Information
Table 20-4 outlines the problems that might cause this symptom and describes solutions to those
problems.
Table20-4 Transparent Bridging: Sessions Terminate Unexpectedly
Possible Causes
Suggested Actions
Excessive
retransmissions
1.
Use a network analyzer to look for host retransmissions.
2.
If you see retransmissions on slow serial lines, increase the
transmission timers on the host. For information on
configuring your hosts, refer to the vendor documentation.
For information on troubleshooting serial lines, refer to
Chapter 15.
If you see retransmissions on high-speed LAN media, check for
packets sent and received in order, or dropped by any intermediate
device such as a bridge or a switch. Troubleshoot the LAN media
as appropriate. For more information, refer to the media
troubleshooting chapter that covers the media type used in your
network.
Use a network analyzer to determine whether the number of
retransmissions subsides.
3.
Excessive delay
over serial link
Increase bandwidth, apply priority queuing, increase the hold
queue size, or modify the system buffer size. For more
information, refer to Chapter 15.
Transparent Bridging: Looping and Broadcast Storms Occur
Symptom:
Packet looping and broadcast storms occur in transparent bridging environments. End
stations are forced into excessive retransmission, causing sessions to time out or drop.
Packet loops are typically caused by network design problems or hardware issues.
Note
Table 20-4 outlines the problems that might cause this symptom and describes solutions to those
problems.
