IPX/SPX Configuration and Management Manual

Protocol Interfaces and Services for NonStop™

IPX/SPX

IPX/SPX Configuration and Management Manual—425731-001

A-6

IPX Packet Header Format

Destination Address

is the IPX address of the destination. See IPX Addresses on page A-6.

Source Address

is the IPX address of the sender. See IPX Addresses on page A-6.

IPX Addresses

An IPX address uniquely identifies a node on an IPX internetwork. An IPX address is

12 bytes long and consists of the 3 fields shown in Figure A-4.

Network

identifies a network, typically a local area network (LAN), within an internetwork.

The network address of the NonStop™ Himalaya S-series server is obtained from a

NetWare file server when the NonStop™ IPX/SPX subsystem is started.

Table A-2. IPX Packet-Type Field Identification

Packet-

Type Value

(in Hex.) Higher-Level Protocol

01 Routing Information Protocol (RIP)

04 Service Advertising Protocol (SAP)

05 Sequenced Packet Exchange (SPX)

11 NetWare Core Protocol (NCP)

14 Network Basic Input/Output Service (NetBIOS)

Figure A-4. IPX Address Format

Note. On a NetWare LAN, IPX addresses are assigned only to NetWare file servers and

dedicated routers and bridges. The NonStop™ IPX/SPX subsystem uses the IPX address

of the first NetWare file server that replies to its broadcast for an IPX address.

020CDT .CDD

Network Node Socket

Bytes