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893-741-B A7-7
Serial Line Internet Protocol (SLIP)
Setting SLIP Port Parameters
Set SLIP parameters using the set port command. The show port slip command displays these
parameters.
• The local_address parameter defines the IP address for this port. This address is the address
for the Model 5390 server’s side of the SLIP link. For example, in Figure A7-2, the
local_address for 5390_01 is 132.254.99.1. In Figure A7-3 the local_address for 5390_01 is
132.254.10.7, which is the same address specified with the Model 5390 parameter inet_addr.
• The remote_address parameter defines the IP address for the remote end of this SLIP link.
This is the address that must be used by the remote host/PC in order to function as a host on
the LAN. Although the address must be unique for the network, it can be assigned arbitrarily.
• The subnet_mask parameter defines the IP subnet mask if the SLIP link is using a subnet.
For example, in Figure A7-1 and Figure A7-2, the subnet_mask setting is 255.255.255.0.
• The metric parameter defines the cost of getting to the remote end of the SLIP link (in
relation to the cost of using other Model 5390 interfaces). This is referred to as the hop count.
You may want to increase this number if the Model 5390 server has a preferred (for example,
faster) route to the remote host. If you do set the metric to a value greater than 1, remember
that you may be decreasing the usable network diameter, since 15 is the highest valid metric
value.
• The allow_compression parameter enables the Model 5390 server to accept compressed
packets.
• The slip_no_icmp parameter discards any ICMP packets that are destined for the SLIP link,
thereby reducing unnecessary traffic and messages over the SLIP link.
• The slip_mtu_size parameter sets the maximum transmission unit (MTU) size on a
compressed SLIP (CSLIP) port to either large (1006) or small (256).
• The slip_tos parameter causes the Model 5390 server to send interactive traffic (telnet,
rlogin, and ftp control sessions) before any other traffic over the SLIP link; it provides a
type-of-service queuing on the link.
• The slip_ppp_security parameter controls dial-up SLIP access. If enable_security and
slip_ppp_security are enabled, access to the SLIP command is restricted via ACP and port
access is logged in the acp_logfile.
• The dialup_addresses parameter enables the Model 5390 server to request the end point
address, based on the user’s login, from ACP.