3Com Switch 7750 Configuration Guide Guide

140 CHAPTER 16: IPX CONFIGURATION
Solutions:
■ Use the display ipx interface command to check whether the forwarding of
type 20 IPX packets is enabled on the input and output interfaces.
■ Use the debugging ipx packet command to enable debugging for IPX packets.
Check whether there is a prompt message of "Transport Control field of IPX
type-20 packet >= 8!" A type 20 IPX packet can only be forwarded up to eight
times; for the ninth forwarding attempt, the packet is dropped.
Troubleshooting IPX RIP
Symptom 1: The switch cannot learn routes from the peer device.
Solutions:
■ Use the debugging ipx rip packet verbose command to enable debugging for
IPX RIP. Check whether there is a RIP packet with routing information from the
peer device to make sure that the underlying connection is available between
the two devices.
■ If there is a RIP packet with routing information from the peer device, you can
use the debugging ipx rip event command to check whether the received
routing information is added into the routing table.
Symptom 2: Try to import a static route to IPX RIP, but no static route is sent out.
Solutions:
■ Use the display ipx routing-table command to check whether the static route
exists.
■ If the static route is not in the routing table, use the display ipx routing-table
verbose command to check whether it exists as an inactive route. If the static
route exists, check the inactive reason. When the route becomes active, it can
be advertised as a RIP route.
■ If the configured static route is shown in the routing table, check whether its
hop count is smaller than 15.
Troubleshooting IPX SAP
Symptom 1: Unable to add static service information into the service information
table.
Solutions:
■ Use the display ipx service-table inactive command to check whether the
service information is in the inactive service information table. If yes, there is no
active route to the server.
■ Check whether the number of service information entries exceeds the
limitation with the display ipx service-table command. IPX can support 10,240
service information entries with up to 5,120 service types and 5,120 static
service information entries.
Symptom 2: A service information entry cannot be found in the service
information table.