User Guide

Troubleshooting the NetWare Server 121
Server Operating System Administration Guide
103-000148-001
August 30, 2001
Novell Confidential
Manual 99a38 July 17, 2001
Because the server responds to the abend automatically, you might not know
when an abend has occurred. Therefore, you should periodically check the
ABEND.LOG file or the Profiling and Debug Information screen in NetWare
Remote Manager (look for Suspended by Abend Recovery status).
Insufficient Packet Receive Buffers, No ECB Available Count Errors
The ECB (event control block) counter is incremented when a device sends a
packet to your NetWare server but no packet receive buffer is available. This
mean a packet has been dropped by the server.
The server allocates more packet receive buffers after each incident until it
reaches its maximum limit (Maximum Packet Receiver Buffer setting).
If you are using an EISA busmaster board (such as the NE3200
TM
board), you
will probably need to increase both the minimum and maximum number of
packet receive buffers.
For procedures on setting the Minimum Packet Receive Buffers and
Maximum Packet Receive Buffers parameters, see SET > Communications
Parameters in Utilities Reference.
No ECB Available Count messages can also indicate that the driver is not
configured correctly or that the Topology Specific Module (TSM) and the
Hardware Specific Module (HSM) are incompatible. This value is maintained
by the TSM.NLM program.
If the ECB count is increasing and all the packet receive buffers are in use,
take a coredump (see “Creating a Core Dump” on page 112) and contact
Novell technical support.
Resolving Slow Server Response
To diagnose slow server response problems, identify whether the following
conditions exist:
 The workstation network board is slow or faulty.
 Network cabling is faulty.
 The server network board is slow or faulty.
 Too many users are using the network.
 The server hard disk is slow or faulty.