NetWare and AppleTalk protocols

Unit 7::NetWare and Apple Talk Protocols
NetWare Network Layer Protocols
There are three protocols that reside in the network layer of the OSI
model.
• IPX Routing Information Protocol (IPX RIP)—IPX RIP is a distancevector
protocol that uses within NetWare the Best Information
Algorithm (BIA) to build routing tables. BIA states that no router will
transmit routing information back to the network from which the
information was received and that routers will only transmit
information about incoming networks. RIP packets are encapsulated,
or included as a whole, within IPX and have a socket value of 0453h.
IPX routers broadcast routing information every sixty seconds to
update all local area network routing tables.
• NetWare Link Service Protocol (NLSP)—This protocol was developed to
eventually replace the Routing Information Protocol (RIP). It is a
routing protocol that was derived from link-state routing and has many
of the same features. NLSP exchanges information about costs of
paths, IPX network numbers and network links. It builds and
maintains routing tables. NLSP compresses the IPX header to reduce
the size of packets. RIP can only forward packets across a maximum of
15 hops; NLSP forwards packets across 127 hops. NLSP does not,
however, update every 60 seconds as RIP does, rather it only updates
routing tables when there is a change in the topology or service. NLSP
also sends routing information only to other NLSP routers, not to all
devices as does RIP.
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ST0025804A
Routing