Novell NETWARE 6-DOCUMENTATION Manual page 1875

IPX RIP Filters
There are two types of service information filters:
Outgoing SAP filters (service advertisement filters)
Outgoing SAP filters restrict the propagation of the SAP information that
is known to the router. An outgoing SAP filter specifies the service
provider and the potential recipient of the information. The service
provider is defined by a service name and service type. The recipient is
defined as an outbound interface or interface group. The filter is applied
to all servers, users, and routers that would receive the SAP information
through the interface. In large NetWare
filtering can save valuable WAN bandwidth, although the NetWare Link
Services Protocol
savings.
Incoming SAP filters (service acceptance filters)
Incoming SAP filters let the router discard information about a particular
service provider. The filtered SAP information is not recorded in the local
SAP information table or propagated to other routers or servers. The SAP
filter includes the service name and service type. An incoming SAP filter
can also specify the source of the SAP information to be filtered. The
source identifies the interface from which the SAP information was
received.
NOTE:
SAP filters work only on routers running the RIP and SAP protocols. They
do not work on routers running the NLSP protocol. For filtering to work, either
IPXRTR must be configured for RIP/SAP only, or the bind options on selected
interfaces must be set up to read RIP=Yes , SAP=Yes , and NLSP=No .
Routers on an IPX network exchange routing information through RIP
packets. By limiting the propagation of this information, RIP filters provide
limited security to IPX networks, reduce the bandwidth required for RIP
updates, and reduce the memory requirements for routing tables.
There are two types of IPX RIP filters:
Outgoing RIP filters
Outgoing RIP filters restrict the propagation of routing information by the
router. An outgoing RIP filter specifies the network to be filtered and the
interface or interface group to which the filter should be applied. The
filter is applied to all servers, users, and routers that receive the RIP
information through that interface or interface group.
(NLSP ) protocol might offer greater bandwidth
TM TM
®
internetworks, outbound SAP
Understanding
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