Lucent Technologies PortMaster - Manual (Page 122)

Configuring Network Users
7-8 PortMaster Configuration Guide
The MTU size is typically set to the maximum allowed for the protocol being used,
either 1500 bytes (for PPP) or 1006 bytes (for SLIP). However, smaller MTU values can
improve performance for interactive sessions. If you are using IPX, the MTU should be
set to at least 600.
To set the MTU for a network user, use the following command:
Command> set user Username mtu MTU
Setting the Maximum Number of Dial-In Ports
You can define the number of dial-in ports that a user can use on the PortMaster for
Multilink V.120, Multilink PPP (only on ISDN), and multiline load-balancing.
If the maximum number of ports is unconfigured, port limits are not imposed and
PortMaster’s multiline load-balancing, Multilink V.120, and Multilink PPP sessions are
allowed. You can also set the dial-in port limit using the RADIUS Port-Limit attribute.
To set the maximum number of dial-in ports, use the following command:
Command> set user Username maxports Number
The Number variable can be set to between 0 and the number of available ports—up to
60.
Setting Compression
Compression of TCP/IP headers can increase the performance of interactive TCP sessions
over network hardwired asynchronous lines. Lucent implements Van Jacobson TCP/IP
header compression and Stac LZS data compression. Compression is on by default.
Compression cannot be used with multiline load-balancing, but can be used with
Multilink PPP.
Compression must be enabled on both ends of the connection if you are using SLIP.
With SLIP, TCP packets are not passed if only one side of the connection has
compression enabled. For PPP connections, the PortMaster supports both bidirectional
and unidirectional compression. Refer to RFC 1144 for more information about header
compression.