Panasonic NN46240-502 - Manual (Page 54)

Nortel Secure Router 8000 Series
Configuration - LAN Access and MAN Access 3 Ethernet interface configuration
3.5 Troubleshooting
This section provides methods for troubleshooting the following faults:
• Pinging the Ethernet interface fails
• Ethernet interfaces cannot receive and send packets
• Ethernet interfaces discard packets
3.5.1 Pinging the Ethernet interface fails
Fault description
Pinging an Ethernet interface of a router on a PC fails.
Fault analysis
The possible causes are as follows:
• The link connection is incorrect.
• The IP address or mask of the interface is incorrect.
Troubleshooting procedure
Step 1 Check whether the PC and the router are connected correctly.
Check the status of the link indicator of the Ethernet interface that connects the router and the
PC:
• If the indicator is on, the connection is correct.
• If the indicator is o^, check the physical devices, such as the network card, network
cable, and interface module of the router.
Step 2 Check that the IP address of the PC and that of the Ethernet interface on the router are in the
same subnet.
—End
3.5.2 Ethernet interfaces cannot receive and send packets
Fault description
The display of the 100 Mbit/s Ethernet interface on a router shows that no connection is set up.
The display of the 10 Mbit/s Ethernet interface on another router shows that the connection is
set up. However, the Active indicator on the physical layer constantly flashes, and packets are
not received and sent.
Fault analysis
A possible cause is that the working speeds of the Ethernet interfaces on the two routers are
inconsistent.
Issue 5.3 (30 March 2009) Nortel Networks Inc. 3-11