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DHCP, SLP, and Option 78 reference
SLP Service Scope Option (Option 79)
The Length value must include one for the 'Mandatory' byte and include four for each Directory
Agent address which follows. The address of the Directory Agent is given in network byte order.
The 'Mandatory' byte in the Directory Agent option may be set to either 0 or 1. If it is set to 1,
the SLP User Agent or Service Agent so configured must not employ either active or passive
multicast discovery of Directory Agents.
The Directory Agents listed in Option 78 must be configured with the a non-empty subset of the
scope list that the Agent receiving the Directory Agent Option 78 is configured with.
SLP Service Scope Option (Option 79)
Services are grouped together using 'scopes'. These are strings that identify a set of services
that form an administrative grouping. Service Agents (SAs) and Directory Agents (DAs) are
always assigned a scope string.
A User Agent (UA) is normally assigned a scope string (in which case the User Agent will only
be able to discover that particular grouping of services). This allows a network administrator to
provision services to users. The use of scopes also allows the administrator to scale SLP
deployments to larger networks.
The Scope-List String is a comma-delimited list of the scopes that a SLP Agent is configured
to use. The Length value must include one for the 'Mandatory' byte.
The 'Mandatory' byte determines whether SLP Agents override their static configuration for
scopes with the <Scope List> string provided by the option. This allows DHCP administrators
to implement a policy of assigning a set of scopes to Agents for service provision. If the
Mandatory byte is 0, static configuration takes precedence over the DHCP provided scope list.
If the Mandatory byte is 1, the <Scope List> provided in this option must be used by the SLP
The Scope List String usage is defined in the SLPv2 specification (RFC2608).
A31003-W1010-A100-1-7619, July 2005
HiPath Wireless Controller, Access Points and Convergence Software V3.0: User Guide