3Com Switch 7750 Configuration Guide Guide

Troubleshooting IPX 141
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 VLAN interface is UP and SAP is enabled with the display
ipx interface command.
■ Check whether the hop count of the route to the server is smaller than 16 with
the display ipx routing-table command.
■ Check whether adequate memory is available for adding the service entry into
the service information table. You can try to add it as a static service entry.
Symptom 3: No new dynamic service entry is found in the service information
table.
Solutions:
■ Check whether the relevant packets are received with the debugging ipx
packet and debugging ipx sap packet verbose commands. If the packets are
not received, the underlying network connection is unavailable.
■ Use the ipx enable command to check whether IPX is enabled.
■ Check whether IPX is configured on the VLAN interface with the display ipx
interface command.
■ Check whether SAP is enabled with the undo ipx sap disable command.
■ Use the display ipx service-table command to check whether the number of
SAP service entries is under the limit. IPX can support 10,240 service entries
with 5,120 service types.
■ Check whether the MTU of SAP packets is less than or equal to the MTU at the
physical layer.
Symptom 4: No update packet is received on the VLAN interface.
Solutions:
■ Check whether there are update packets with the debugging ipx packet and
debugging ipx sap packet verbose commands. All the received/transmitted
packets can be displayed through debugging information. If there are no
update packets, check whether the underlying network connection is available.
■ Use the display ipx interface command to check whether SAP is enabled.
■ Check whether the hop count of the active route to the server is smaller than
16.
■ Use the display current-configuration command to check whether the update
interval is too long.
■ Use the display current-configuration command to check whether the
triggered updates feature is configured on the VLAN interface. Periodical
update is disabled when the triggered updates feature applies.
Symptom 5: No update packets are sent out of the VLAN interface.