ADTRAN Express L128T S User Manual page 135

Ethernet, check whether IPXCP (Internet Control Protocol) is
up. If this failed, verify that the called party supports IPX
routing.
4. Layer 2 LAN Operation: After an attempt to pass traffic from the
host machines on the LAN, verify that ARP exists on the router
and on the host computer.
5. Layer 2 General Bridging Troubleshooting Tips (skip if not bridg-
ing):
A. Check to see that Bridging is enabled on both the LAN and the
WAN (connection list) of the L128T S/T.
B. Make sure that the IP and/or IPX network numbers are the
same as the network numbers on the peer bridge. For in-
stance, if the far end has an IP address of 172.16.1.100 with a
255.255.255.0 mask, the Ethernet address of the near end rout-
er should be unique and on the 172.16.1.x network (e.g.,
172.16.1.101). With IPX, the same scenario applies. If the far
end has an IPX address of 1111:1111, the near end router
should also have an IPX network address of 1111:1111.
C. Verify in the bridging table that an entry to the network you
are trying to reach is present.
D. Verify that the addresses of the hosts you are trying to connect
to are on the correct network.
E. Try to PING the far end bridge's IP address with the L128T S/
T's PING utility to verify connection.
F. Verify that the host IP network addresses agree with the local
router's Ethernet port IP address.
G. From a host machine, try to PING the far end IP address. If un-
successful, perform a trace route operation and see where the
ICMP request stopped.
6. Layer 3 General IP Routing Troubleshooting Tips:
A. Check to see that IP Routing is enabled on both the LAN and
the WAN (connection list) of the L128T S/T.
B. Make sure that the IP and/or IPX network numbers are differ-
ent from the network numbers on the peer router. For in-
stance, if the far end has an IP address of 172.16.1.100 with a
255.255.255.0 mask, the Ethernet address of the near end rout-
er should be unique and on a different network (e.g.,
61202070L3-20 Express L128T S/T User Manual
Chapter 4. Troubleshooting
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