IPX/SPX Configuration and Management Manual

Protocol Interfaces and Services for NonStop™
IPX/SPX
IPX/SPX Configuration and Management Manual—425731-001
A-3
Routing Information Protocol (RIP)
Internet address
is the IPX address of the server. See IPX Addresses on page A-6.
Hops to server
is the number of routers that the packet must pass to reach the server.
Time since changed
removes entries for a server that started but has subsequently stopped advertising.
See Examples of NonStop™ IPX/SPX Functions
on page A-13 for a description of how
the ODBC Server advertises its services on a NetWare network and how a client
workstation learns of the server and connects to it.
On the NonStop™ Himalaya S-series server, the SAP table is maintained by the
IPXPROTO process. The SCF STATUS SERVER #SAP command displays the
following SAP table information:
Clients can query the SAP tables for available services and obtain the addresses of the
servers that are offering those services. A client may look for a specific server or for
servers of a particular type. The NWSCAN utility, available with the PC6530 Terminal
Emulator (PCT) product, shows servers on the NonStop™ Himalaya S-series server. The
TSRVSCAN utility, also available with PCT, shows available Telserv servers. These
utilities are described in the PC6530 User’s Guide.
Routing Information Protocol (RIP)
RIP maintains routing tables that IPX uses to find the fastest route to transmit data on an
internetwork. RIP is needed when the destination address of an IPX packet contains a
different network field value than the source address. The RIP routing tables are
consulted for the route with the fewest number of hops (routers that must be passed
through in order to reach the destination). If multiple routes exist with the same
minimum number of hops, the route with the lowest tick count is selected. (Tick count is
an administrator-defined estimate of the number of ticks that it should take to reach the
destination network.)
The node address of the router that has the shortest route to the destination network is
placed into the Media Access Control (MAC) header. Each router that the packet passes
through changes the MAC Destination and Source address fields. The end node remains
as the destination address in the IPX header.
SCF> STATUS SERVER $ZNV0.#SAP
IPXSPX Status SERVER \CB2.$ZNV0.#SAP
Name Address Type Hops
TREX 0x0000FACE:000000000001:0451 %H0004 1
HABANERO 0x0000000A:000000000001:0451 %H0004 2
HABANERO 0x0000000A:000000000001:0451 %H0107 3
RAPTOR 0x0000CAFE:000000000001:8104 %H0004 1
RAPTOR_PSERVER 0x0000CAFE:000000000001:8060 %H0004 2
RAPTOR 0x0000CAFE:000000000001:8104 %H0107 2