3Com Switch 7750 Configuration Guide Guide

Troubleshooting IPX 139
# Assign the network number 1000 to VLAN interface 1 to enable IPX on the
VLAN interface.
[SW7750] interface Vlan-interface 1
[SW7750-Vlan-interface1] ipx network 1000
# Configure a static route with the destination network number 2.
[SW7750-Vlan-interface1] quit
[SW7750] ipx route-static 2 1000.00e0-fc01-0000 tick 7 hop 2
# Configure a service information entry, indicating that Server can provide the file
service.
[SW7750] ipx service 4 fileserver 2.0000-0c91-f61f 451 hop 2
# Configure a service information entry, indicating that the server can provide the
printing service.
[SW7750] ipx service 7 printserver 2.0000-0c91-f61f 5 hop 2
Troubleshooting IPX Troubleshooting IPX forwarding
Symptom 1: A destination address cannot be pinged.
Solutions:
■ Check whether the destination address is correct.
■ Use the display ipx interface command to check whether the network number
and IPX frame encapsulation format configured on the interface of the switch
are consistent with those configured on the connected interface.
■ Use the display ipx routing-table command to check whether the destination
network is reachable.
■ Use the debugging ipx packet command to enable debugging for IPX packets.
Check whether IPX packets are correctly received, transmitted, forwarded, and
dropped.
Symptom 2: Packets are dropped.
Solutions:
■ If the IPX packet debugging information shows that a packet is dropped
because "Packet size is greater than interface MTU!", perform the following
operations: Display the MTU setting on the VLAN interface with the display
interface command and the RIP/SAP packet size with the display ipx interface
command. Check whether the RIP/SAP packet size is smaller than the MTU
setting on the VLAN interface.
Symptom 3: The switch cannot receive SAP packets.
Solutions:
■ Use the display ipx interface command to check whether SAP is disabled on the
VLAN interface.
Symptom 4: A type 20 IPX packet cannot be transmitted to other network
segments.