Information Technology Reference
In-Depth Information
Table8-2
Novell IPX: Client Cannot Connect to Server on Remote LAN (continued)
Possible Problem
Solution
Router hardware
problem has
occurred.
Check all router ports, interface processors, and other router
hardware. Make sure that cards are seated properly and that no
hardware is damaged. Replace faulty or malfunctioning
hardware.
For detailed information on troubleshooting router hardware
problems, refer to Chapter 3, “Troubleshooting Hardware and
Booting.”
Back-door bridge
between segments
exists.
1.
Use the
show ipx traffic
exec command on intermediate
routers. Determine whether the bad hop count field is
incrementing.
2.
If the bad hop count counter is incrementing, use a network
analyzer to look for packet loops on suspect segments. Look
for RIP
3
and SAP updates as well. If a back-door bridge
exists, you are likely to see hop counts that increment to 16,
at which time the route disappears and reappears
unpredictably.
3.
Look for packets from known
remote
network numbers that
appear on the
local
network. Look for packets whose source
address is the MAC
4
address of the remote node instead of
the MAC address of the router.
4.
Examine packets on each segment. A back door is present on
the segment if packets appear whose source address is the
MAC address of a remote node instead of that of the router.
5.
Remove the back-door bridge to close the loop.
Routing protocol
problem has
occurred.
Misconfigurations and other routing protocol issues can cause
connectivity and performance problems.
1.
LIPX = Large Internet Packet Exchange
2.
FDDI = Fiber Distributed Data Interface
3.
RIP = Routing Information Protocol
4.
MAC = Media Access Control
Novell IPX: Clients Cannot Connect to Server over PSN
Symptom:
Clients cannot connect to servers over a packet-switched network (PSN), such as Frame
Relay, X.25, or SMDS. Clients can connect to local servers.
Procedures for troubleshooting connectivity problems not specific to PSN environments are described
in the section “Novell IPX: Client Cannot Connect to Server on Remote LAN,” earlier in this chapter.
