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 Embedded Web Service. Go to Printer Server Settings 
Print Server Settings 
SLP.
•SLP Protocol: You can enable or disable SLP.
•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.
•SLP Multicast TTL: The value is from 1 to 255.
•Registration Lifetime, Hours: You can define the time in seconds before the Server Agents registration expires.
•SLP MTU: The value is from 484 to 32768.
•SLP Port In Use: The port number is fixed to 427.
•Multicast Address: The Multicast Address value is fixed to 239.255.255.253, 224.0.1.127.
Appendix B. Management protocols
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