Networking

Increasing system semaphores

If a socket performs a listen(3sock), a semaphore is allocated for the socket. By default, there are 150 semaphores available on the system. If more than 150 semaphores are required the kernel tunable SEMMNI must be increased.

listen(3sock) will fail with ENOSPC if no semaphores are available.

Spurious talkd error message

When TCP/IP is stopped, a message is displayed from talkd(1Mtcp). This should be ignored.

DHCP supports single subnet per interface

DHCP only supports a single subnet on each network interface.

IP/ARP configuration error

A problem in IP puts the wrong value, 8 instead of 4, in the ``dl_dest_addr_length'' field of the DL_UNITDATA_REQ message sent downstream when ARP is disabled.

IPX/SPX configuration error

You may encounter an error message, similar to the following, when trying to configure IPX/SPX over token ring:

   NetWare IPX setup at Fri May 15 11:46:23 EDT 1998
   NWCM-2.1-147: Folder 7 is NOT valid.
   NWNET-2.1-232: Invalid frame_type for configured adapter_type
   Novell Protocol Suite Streams Architecture Daemon
   Reading configuration from "/etc/netware/nwconfig"
   IPX Internal Network configured, setting Router Type to FULL
   Problem starting up npsd

If you see this message, you should enter:

   nwcm -s "lan_1_adapter_type=TOKEN-RING_DLPI

and reboot the system.

Connection server error

The Connection server can dump core if the Systems file does not have a phone number in the phone number field.

The work around is to place a '-' in the phone number field when you do not have any phone numbers (for Direct connections for example).

finger reports incorrect idle time

The finger(1tcp) command may report the idle time of the session from which it is called incorrectly.

Error removing DNS

If you have installed DNS, make sure you have a valid Ethernet connection. If your Ethernet connection is faulty or disconnected, and you try to remove packages, the system tries to send email to acknowledge the package removal. The system uses the resolve.conf file in /etc that was created during the DNS installation to acknowledge the package removal.

If the Ethernet is faulty, the system cannot reconcile any email addresses on the network. Thus the system will appear to hang. If this occurs, ensure the Ethernet connection is valid and retry the package removal, or kill the email processes to free up the removal process.

ISDN limitations

Incoming and outgoing ISDN V.120 calls are not supported. Devices configured as type ISDN_ASYNC are not supported, for example, the Eicon Diva Pro 2.0 ISDN adaptor. Service types of isdn_async in Callfilter and Callservices are not supported.

PPP bandwidth allocation

PPP does not support bandwidth allocation using BAP/BACP.

PPP Stac LZS compression

PPP does not support Stac LZS compression. Predictor-1 compression protocol is supported.