Ricoh Aficio SP 5100N User Manual download pdf (Page 113)

TCP/IP environment

SLP

Service Location Protocol (SLP) is an Internet standard network

protocol that provides a framework to allow networking

applications to discover the existence, location, and

configuration of networked services in enterprise networks,

such as printers, Web servers, fax machines, video cameras,

file systems, backup devices (tape drives), databases,

directories, mail servers, and calendars.

In order to locate services on the network, users of network

applications are required to supply the host name or network

address of the device that supplies a desired service. However,

SLP eliminates the need for a user to know the name of a

network host supporting a service. Rather, the user only needs

to supply the desired type of service and set of attributes or

keywords, which describe the service.

Based on that description, SLP also resolves the network

address of the service of the user. Administrators do not need

to help clients find new services or to remove services when

they are no longer available. SLP uses multicasting and can

work over subnet boundaries.

Configuring SLP

You can configure SLP protocol settings through Web Image

Monitor SP 5100N. Select

Network Settings

SLP

•

SLP Protocol

: You can enable or disable SLP.

•

Port Number

: The port number is fixed to 427.

•

Scope 1 ~ 3

: A scope is a set of services and a string used

to group resources by location, network, or administrative

category. Each scope should not be more than 32

characters.

•

Message Type

: You can select the outgoing SLP message

type sent to network devices. The default value is

Multicast

•

Multi Cast Radius

: You can specify the maximum number

of subnets that SLP multicasts can travel across. This value

is also called the “hop count” or “time-to-live” (TTL). The

default value is 255.

•

Registration Lifetime

: You can define the time in seconds

before the Server Agents registration expires.

•

Multicast Address

: The Multicast Address value is fixed to

239.255.255.253, 224.0.1.127.

Using SLP

Once

SLP enabled

is checked, the network print server works

as a Service Agent and the User Agent.

Dynamic DNS (DDNS)

DNS (Domain Name System) is used for registration of domain

names and provides Host names to an IP address resolution

service. For printer devices, DNS may be utilised for printer

domain name registration, so that print server clients may refer

to the printer by its host name rather than by its IP address.

Even though a printer’s IP address is changed, all clients can

operate this printer without reconfiguration. Addressing to a

printer device by IP address is not convenient and may often go

stale if an IP address to a device is assigned dynamically via a

DHCP server. If the DHCP server can provide information about

a printer’s changing IP address to the DNS server

automatically, user convenience is increased. The printer’s

name will be used as its DNS name.

Configuring DDNS

Let the DHCP server provide updated information to the

DNS server.

Configure the same DDNS domain through Web Image

Monitor SP 5100N as entered in the DNS server.

If you connect your network printer via a web browser, you

can enable this by selecting

Network Setting

TCP/IP

Dynamic DNS Registration

Set the IP assignment method of your network print server

DHCP

and reboot the printer.

The DNS server will update its database and users can use

the printer’s name instead of its IP address.

WINS

Before Dynamic DNS was defined, DNS could only be updated

manually when DHCP servers automatically provided (or

removed) IP addresses. As a result, DNS servers often

contained obsolete listings. In response, Microsoft developed

Windows Internet Name Service (WINS) to solve this problem

for NetBIOS names.

Microsoft now recommends moving to Dynamic DNS and away

from WINS. However, many customers including Microsoft

maintain WINS systems and need devices to interoperate with

WINS. So devices must, at least for now, support WINS

interoperability to allow for dynamic NetBIOS name to IP

address registration and resolution.

WINS provides a distributed database for registering and

querying dynamic NetBIOS names to IP address mapping in a

routed network environment. This is the best choice for

NetBIOS name resolution in such a routed network because it

is designed to solve the problems that occur with name

resolution in complex Internet networks.

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Ricoh Aficio SP 5100N User Manual Page 113

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