Routing Ipx Over Isdn - Bay Networks NauticaRS Reference Manual

Routing IPX over ISDN

117237-E Rev.00
The Nautica series routers have a complete set of Novell spoofing
algorithms, so they can emulate the remote network locally and
eliminate unnecessary transmissions over the ISDN link. The
Nautica router deals intelligently with IPX RIP packets, IPX
Watchdog Packets, Serialization packets and SPX packets from
each client and server.
IPX RIP Frames: Routing Information transmissions to update
the device routing tables are sent every 60 seconds.
IPX SAP Packets: IPX Service Advertising Packets are sent out
every 60 seconds, and inform the rest of the network what
services, such as print and file servers, are available on the
network.
IPX Watchdog Frames: Periodic polls sent out to workstations
with a server session active, to find out if they are still attached.
These polls are sent out at about 10 minute intervals maximum,
ensuring workstations remain connected to the server even though
no data is being transmitted.
IPX Serialization Packets: Used to ensure the correct number of
licenses for the number of servers installed on the network.
Broadcasts to all other servers every 66 seconds .
SPX Packets: Sequenced Packet Exchange is used by some
applications (such as BTRIEVE and other databases, gateways
etc.) and is a connection-oriented, guaranteed delivery protocol.
This is achieved by SPX being contained within IPX, and sending
idle "Keep Alive" packets and generating acknowledgments to
received packets.
Introduction to Protocols and Routing
1-9