3Com Switch 7700 Configuration Manual page 93

Check that the VLAN interface is UP and SAP is enabled with the display ipx
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interface command.
Check that the hop count of the route to the server is smaller than 16 with the
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display ipx routing-table command.
Adequate memory is available for adding the service entry into the service
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information table. You can try to add it as a static service entry.
3 No new dynamic service entry is found in the service information table.
Verify that:
The relevant packets are received with the debugging ipx packet and
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debugging ipx sap packet verbose commands. If the packets are not received,
check that the underlying network connection is available.
IPX is enabled using the ipx enable command.
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IPX is configured on the VLAN interface with the display ipx interface
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command.
SAP is enabled using the undo ipx sap disable command.
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The number of SAP service entries is under the limit with the display ipx servers
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command. IPX can support 10240 service entries with 5120 service types.
The MTU of SAP packets is not greater than the MTU at the physical layer.
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4 No update packet is received on the VLAN interface.
Verify that:
There are update packets with the debugging ipx packet and debugging ipx
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sap packet verbose commands. If there are no update packets, check that the
underlying network connection is available.
SAP is enabled with the display ipx interface command.
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The hop count of the active route to the server is smaller than 16.
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The update interval is not too long with the display current-configuration
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command.
The triggered updates feature is not configured on the VLAN interface with the
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display current-configuration command. Periodical update is disabled when the
triggered updates feature applies.
5 No update packets are sent out the VLAN interface.
Verify that:
There is information about update packets by executing the debugging ipx
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packet and debugging ipx sap packet verbose commands. Then, check that the
MTU of the SAP packets is smaller than the MTU of the VLAN interface to
guarantee that they are not discarded by the underlying layer.
The triggered updates feature is not enabled on the VLAN interface with the
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display current-configuration command to check. Periodical update is disabled
when the triggered updates feature applies.
Check that all service information is learnt from the VLAN interface. Then,
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check that split horizon is disabled on the VLAN interface.
6 SAP does not respond to GNS requests.
Verify that:
IPX Configuration 85