3com 500 Manual De Usuario

 

 

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Novell IPX also uses RIP for routing purposes. Although it is similarly 

 

named to the IP equivalent, it uses a different protocol. IPX RIP 

 

broadcasts datagrams out onto the network every sixty seconds. Upon 

 

receipt of a RIP datagram, a router adds one to the hop count of each 

 

route advertised and broadcasts a RIP datagram to the other networks, 

 

with which it is connected.

 

The cost of a route in an IPX network is determined by the metric known 

 

as 

 

. In a LAN only environment this is the hop count plus one, e.g. 

 

three hops or four ticks. For an internetwork connected via a WAN or 

 

ISDN links, the tick count is factored on the speed of the WAN link.

 

We saw above the common network numbering scheme employed 

 

for a bridged network. By employing routing, LAN A, LAN B and LAN C 

 

become three separate networks on a network. The network 

 

numbering must reflect that situation.

 

In a Novell IPX environment we could allocate IPX network numbers 

 

00000111 to LAN A, 00000222 to LAN B and 00000333 to LAN C. 

 

Having configured the ports of the AccessBuilder 500 to accept this 

 

protocol, routing will now occur between the remote network servers 

 

and workstations but addressed by different network numbers.

 

It should be noted that NetWare 3.X and later, uses the concept of internal 

 

IPX addresses, which is somewhat similar to network addressing. The 

 

internal address refers to the internal network within that server allowing 

 

internal processes to communicate. These numbers must be unique for all 

 

servers right across the network. Although network servers may appeared 

 

wired correctly, and in other respects seem to be working correctly, 

 

duplicated internal IPX addresses will not allow correct operation.

 

NetWare has a hop count limitation imposed by the RIP. On an IPX 

 

network a data packet can cross a maximum of fifteen routers before 

 

being discarded.