available, the name of the server, and its IPX address. SAP is an IPX protocol that provides a
means of informing network clients, via routers and servers, of available network resources and
services. These updates are sent out every 60 seconds by devices on the network that provide a
service for others, such as file servers and print servers. A router listens to these SAP updates
and builds a SAP table that shows all known services.
consume bandwidth. The periodic broadcasts can overwhelm a slow link. The CCDP should
consider filtering SAP broadcasts.
caused by RIP and SAP, implement incremental RIP and SAP.
advantage of the features of link-state protocols and the demands of large internetworks. Link-
state protocols adapt faster to topology changes than distance-vector protocols. NLSP has the
following features:
Intermediate System (IS-IS) protocol with just a backbone area. Because only one area is
supported, the number of routers that can participate must be limited. Cisco recommends that
the size of one NLSP process be limited to 400 routing nodes. NLSP works best when all the
routing nodes are in the same geographic area. In a campus design, each separate campus
should have its own NLSP process.