H3C S7500 Series Operation Manual page 164

Operation Manual – IP Address-IP Performance-IPX
H3C S7500 Series Ethernet Switches
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: View the MTU setting on the VLAN interface using the display
interface command and the RIP/SAP packet size using 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: An IPX packet of Type 20 cannot be transmitted to other network
segments.
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.
II. 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 an RIP packet with routing information from the
peer device to make sure that the underlying connection is available between the
two devices.
3-13
Chapter 3 IPX Configuration