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SLP Design and Implementation Guidelines

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Posted: 14 May 2002
 

Another 5-star document released by the deep-thinkers in Novell Technical Services. This piece details how to get the most out of the Service Location Protocol.

For the full details check out TID-10062474

The Service Location Protocol provides the same function in IP networks as SAP provides in IPX networks. It registers information in a database and allows clients to query the database to find services. There are, however, two principal differences between SAP and SLP:

  1. SLP does not maintain a global database of services. It registers services only in the local area. It discovers services in the local area via multicast requests, which are forwarded using NDS replication from network to network within a site.
  2. SLP assumes that the client is able to locate either services themselves, or a database server representing those services, using these pan-network multicasts.

Through Novell's integration of SLP with NDS, local SLP information is compiled to provide a global representation of all available services on the network. This provides dynamic discovery of services locally and scalability in large networks.

Here's what's covered:

  • SLP Scoping
  • General Scoping Suggestions
  • Case 1: Single Corporate Scope (Less than 500 NCP Servers)
  • Case 2: Multi Corporate Scope (Over 500 NCP Servers)
  • SLP Directory Agent (DA) quantity/server placement
  • Example 1 (Large Corporation):
  • Example 2 (Smaller Company):
  • NDS Location of SLP Objects
  • DA Server Object
  • SLP Scope Unit Object
  • Example Tree
  • SLP Service Object
  • Server Configuration
    • Suggested SET Parameter Tuning
    • SET NCP over UDP = ON
    • SET SLP CACHE TIMEOUT = 1800
    • SET SLP ENABLE UA MULTICAST = ON/OFF
    • SET SLP REGISTER NWSERVER = OFF
    • SET SLP SCOPE LIST = Scope1,Scope2,Scope3
    • SET SLP DA DISCOVERY OPTIONS = 15
    • SLP.CFG Parameters

  • Infrastructure Configuration
    • SLP Ports
    • DHCP Options
    • Multicast Domain

  • Client Configuration
    • Scope List
    • Static checkbox by Scope List
    • Directory Agent List
    • Static checkbox by Directory Agent List
    • SLP Cache Replies


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