Ipx Netbios; Protocol And Standards; Hardware Compatibility With Ipx; Configuring Basic Ipx - H3C MSR3600-51F Configuration Manual

SAP defines three types of packets, service query, service response, and periodic updates. The
following subsections describe how SAP operates:
NetWare client initialization
When a NetWare client is initializing, it needs to locate a server. To do so, the client broadcasts a get
nearest server (GNS) request. At least one router or server can give a SAP response, which contains
information such as packet type, service type, and server name and address. The NetWare client
can communicate with the server through the IPX address in the response packet.
Because the GNS request is broadcast, the client can only get a response from the server in the local
IPX network.
To locate a server in another network, the IPX router can send a RIP request to get the route to the
server, and send the route and service information to the client. In this way, the client can
communicate with a server in another network.
Periodic update of SAP
A server broadcasts a SAP packet to provide the service name and type, and its IPX address. The
IPX router that receives the broadcast will add the service to the service information database and
periodically broadcast such information in the directly connected networks. The advertisements can
thus flood the entire network.
By default, SAP broadcasts are sent every 60 seconds. Each packet can have up to seven service
information items by default. If a large amount of service information needs to broadcast, the
information can be sent in several packets. For example, 20 service information items can be sent in
three packets.

IPX NetBIOS

As a broadcast, a NetBIOS packet is not routable. Therefore, a certain mechanism is needed for the
routing device to forward such packets.
To enable use of network basic input/output system (NetBIOS) in a NetWare environment, Novell
uses a mechanism to set the packet type contained in the IPX header to 20, indicating that the IPX
packet is a NetBIOS packet. A device must forward such packets according to certain rules to make
sure NetBIOS packets are transmitted in the IPX network.

Protocol and standards

•
RFC 1132, Standard for the transmission of 802.2 packets over IPX networks
•
RFC 1634, Novell IPX Over Various WAN Media (IPXWAN)

Hardware compatibility with IPX

IPX is not available on the following routers:
•
MSR 2600.
•
MSR 30-11.
•
MSR 30-11E.
•
MSR 30-11F.
•
MSR3600-51F.

Configuring basic IPX

Follow these guidelines when you configure basic IPX:
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