128
Internetwork Packet Exchange
Internetwork Packet Exchange
103-000176-001
August 29, 2001
Novell Confidential
Manual
99a
38
July 17, 2001
IMPORTANT:
Each LAN segment must have a unique IPX network number. It is
a common error to incorrectly use the same IPX network number on each side of
an unnumbered PPP or WAN link.
3
Verify that all servers and routers in the entire internetwork have unique
internal network numbers.
In addition, each network segment has a unique network number, and all
servers and routers on the same segment must have their interfaces
configured with the same IPX network number.
3a
Look at the routing table in IPXCON on any NetWare Link Services
Protocol
TM
(NLSP
TM
) system in the suspected area (parameter path:
Select NLSP Information > Routers).
Determine whether there are routers that appear and disappear from
the table (these routers might also become unreachable for brief
periods of time). Then establish a remote connection with
RCONSOLE and check for any error messages indicating duplicate
internal network numbers.
Typically, if you can log in to a server, but cannot establish a
connection to the same server using RCONSOLE, then the server is
configured with a duplicate IPX address.
3b
Enable SAP on one of the interfaces in a router in the NLSP area.
Between SAP periodic updates, you should see two routers (or more,
if more than one router has the same internal network number) being
listed as unreachable and then reachable. This should occur every 5
to 10 seconds.
4
After you have identified the NLSP systems with the problem, load
IPXCON to determine to which networks the servers or routers are
connected (parameter path: Select NLSP Information > Routers).
5
Select the NLSP router that is the source of the problem. You might need
to select the router several times because its connectivity is intermittent.
If the router is a Novell router, then the internal network number is
probably a duplicate.
6
Change one of the router's internal network numbers and restart the
system.
7
For WAN links, verify that third-party routers use IPXWAN
TM
software
(RFC 1362, 1551, or 1634).
