HP 200 Series Services And Applications page 155

Novell IPX Routing Service
Service Advertising Protocol
or changes a bindery entry and broadcasts service advertising packets to
other networks. On HP routers, the SAP bindery (table) can be displayed
using NCL's Rgetis command. For more information on the IPX SAP table,
refer to the operator's guide for an HP router.
HP routers have a service advertising socket (SAS)—452h—used to respond
to client requests for information on network servers. HP routers also broad-
cast unsolicited SAP packets, called GSRs (general service responses). GSRs
contain the entire bindery if no SAP filters are configured. GSRs are broad-
cast every 60 seconds on LANs. On WAN circuits, you can configure the GSR
broadcast period in the range of 1 to 99 minutes, or you can disable GSR
broadcasts.
NetWare clients use the IPX broadcast facility to obtain information on
network servers. Two types of queries are supported. General-service
queries solicit information on all network servers. Nearest-service queries
solicit information on the closest service of a specific type.
SAP Filters
HP routers support SAP filters, which are used to logically partition IPX
internetworks by controlling the advertisement of servers. A NetWare client
cannot access a server that is not advertised to it. All servers in the bindery
are advertised if no filters are configured.
SAP filters are configured for each interface. Two levels of SAP filters are
supported. Network-level filters permit or deny advertising of servers that
match a pattern of network number and server type on a given interface.
Server-level filters allow you to permit or deny advertising servers that
match a pattern of server name and server type on a given interface. Server
names can be up to 48 case-sensitive characters.
For both filter levels, there are patterns to indicate all networks or all server
types. Up to 50 filters of each level can be configured. When both levels of
filters are configured on a single interface, server-level filters take prece-
dence over network-level filters. Also, for multiple filters of a given level, the
ones that are configured first have lower precedence than those that are
configured later.
For more information on configuring SAP filters, refer to the IPX
configuration parameters in the reference manual.
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