3Com Switch 7700 Configuration Manual page 92

84 C 4: N
HAPTER ETWORK
P O
ROTOCOL PERATION
Use the display ipx interface command to check that SAP is not disabled on the
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VLAN interface.
4 A type 20 IPX packet cannot be transmitted to other network segments.
Do the following:
Execute the display ipx interface command; check that the forwarding of type
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20 IPX packets is enabled on the input and output interfaces.
Debug IPX packets with the debugging ipx packet command to check that
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there is no 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
1 The switch cannot learn routes from the peer device.
Do the following:
Debug IPX RIP with the debugging ipx rip packet verbose command; check that
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there is a RIP packet with routing information from the peer device to make
sure the underlying connection is available between the two devices.
If there is a RIP packet with routing information from the peer device, you can
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use the debugging ipx rip event command to check that the received routing
information is added into the routing table.
2 Try to import a static route to RIP, but no static route is sent out.
Do the following:
Use the display ipx routing-table command to check that the static route exists.
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If the static route is not in the routing table, use the display ipx routing-table
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verbose command to check that it exists as an inactive route and to check for
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 that its hop
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count is smaller than 15.
Troubleshooting IPX SAP
1 Unable to add static service information to the service information table.
Do the following:
Use the display ipx service-table inactive command to check that the service
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information is not in the inactive service information table. The entry is put
there if there is no active route to the server.
Check that the number of service information entries does not exceed the
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limitation with the display ipx servers command. IPX can support 10240 service
information entries with up to 5120 service types and 5120 static service
information entries.
2 A service information entry cannot be found in the service information table.
Do the following:
Check that the service information is not in the inactive service information
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table with the display ipx service-table inactive command. The entry is put there
if there is no active route to the server.