IBM AS/400E 150

compression,

AS/400 establishes a session that does not use header

compression. Therefore, you should not need to change this value.

Using header compression improves the performance of the serial line,

which is usually slow anyway.

Maximum Transmission Unit:

4The maximum transmission unit (MTU) is the size in bytes of the largest

packet that is to be sent over the physical line that this interface uses.

Note: The MTU size cannot be larger than the maximum buffer size

(MAXBUFFER) on the *ASYNC line description that this *SLIP

interface uses.

Add Default Route:

5If you change this value to Y(Yes),AS/400 adds a default route to the

remote system when the session is started. The local interface address

speciﬁed in this conﬁguration proﬁle becomes the next hop for the default

route that is added. Turn this option off when you know to which host this

AS/400 system will connect.

Note: There can be only one active default route. If the Start Point-to-Point

TCP/IP (STRTCPPTP) command is issued for a conﬁguration proﬁle

that speciﬁes Yfor

Add default route

ﬁeld, and a default route is

already active, the session cannot start.

Additional Name Server:

6Enter the IP address of a name server that is accessed through the

point-to-point connection to the remote system.

If you specify a name server address, AS/400 adds the name server

address to the end of any existing list of name servers when this

conﬁguration proﬁle is started. This ﬁeld is valid only for *DIAL point-to-point

TCP/IP proﬁles.

If you use an ISP to connect to the Internet, you may receive a name

server address from the ISP.Then when you connect, you can use host

names instead of IP addresses for remote sites.

If you add an additional name server for this connection, then you must fully

qualify any host names on this connection. Otherwise, the domain of your

local AS/400 is appended to the unqualiﬁed host name. If this occurs, the

additional name server cannot ﬁnd the host entry.

Note: There can only be one active point-to-point session with an

additional name server address deﬁned. If the Start Point-to-Point

TCP/IP (STRTCPPTP) command is issued for a proﬁle that speciﬁes

Yfor the

Additional Nameserver

ﬁeld, and a point-to-point proﬁle is

already active with an additional name server address, the session

cannot start. The default value for this ﬁeld is *NONE. The list of

name servers is not changed.

This name server provides limited support when connecting to a remote

network. Most sockets applications that were activated prior to establishing

1.SLIP support with header compression is also called CSLIP, or Compressed Serial Line Internet Protocol.

150 OS/400 TCP/IPConﬁguration and Reference V4R4