Technical data

Configuring the DHCP Server
7.7 Configuring DHCP Manually
Table 7–8 (Cont.) BOOTP/DHCP Configuration File Symbols
Symbol Function Value Format Description
sl All subnets are
local
0 or 1 Specifies whether the client can
assume that all subnets of the
IP network to which the client is
connected use the same MTU as the
subnet of that network to which the
client is directly connected.
sn Boot file server
name
ASCII string Specifies the host name of the bootfile
server.
sm Subnet mask IP address Specifies the client’s subnet mask as
per RFC 950. A subnet mask allows
the addition of subnetwork numbers
to an address and provides more
complex address assignments. If
both the subnet mask and the router
option are specified in a DHCP reply,
the subnet mask option must be first.
sp SMTP servers IP address list Specifies a list of SMTP (Simple Mail
Transport Protocol) servers available
to the client. Servers should be listed
in order of preference.
sr Static route IP address list Specifies a list of static routes that
the client should install in its routing
cache. If multiple routes to the same
destination are specified, they are
listed in descending order of priority.
The routes consist of a list of IP
address pairs. The first address is
the destination address, and the
second address is the router for the
destination.
st StreetTalk servers IP address list Specifies a list of StreetTalk
servers available to the client.
Servers should be listed in order
of preference.
sw Swap server IP address Specifies the IP address of the client’s
swap server.
sv Server IP IP address Specifies the server ID in a
DHCOFFER and DHCPREQUEST
message and optionally in a
DHCPACK and DHCPNAK
messages. DHCP servers include
this option in the DHCPOFFER
in order to allow the client to
distinguish between lease offers.
DHCP clients use the contents of
the ‘‘server identifier’’ field as the
destination address for any DHCP
messages unicast to the DHCP
server. DHCP clients also indicate
which of several lease offers is being
accepted by including this option in a
DHCPREQUEST message.
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7–58 Configuring the DHCP Server