Nokia IP350 Installation Guide - Page 91

Performing the Initial Configuration., Troubleshooting, Routing Problems

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General Troubleshooting Information Localize the problem by issuing pings to various network interfaces. Use tcpdump to help isolate the problem. Use tcpdump to verify that a packet is leaving or entering a port. Problem Interfaces not up. Solution Ensure that all interfaces are up and active, as described in Chapter 3, "Performing the Initial Configuration." Problem No route to network. Solution Check the routing table to see if a route exists to the network where the interface is located. If no route exists, see "Troubleshooting Routing Problems" on page 95. Problem Attached device does not have proper default route or routing information. Solution If a local computer is unable to ping through an attached appliance, the computer might contain either an invalid default route or invalid routing information. If you are using default routes from a computer, ensure that the local interface is the default route for that computer. Problem The ARP table has old information. Solution If the ARP table has an old or invalid entry for the device associated with the IP address you are attempting to ping, use Voyager to delete the invalid entry. For information about how to access Voyager and the related reference materials, see "Accessing Nokia Network Voyager" on page 34. To delete the invalid entry 1. Click Config. 2. Click ARP in the Interfaces section. Nokia 60s and 100s Installation Guide 91

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General Troubleshooting Information
Nokia 60s and 100s Installation Guide
91
Localize the problem by issuing pings to various network interfaces. Use
tcpdump to help isolate the problem. Use tcpdump to verify that a packet is
leaving or entering a port.
Problem
Interfaces not up.
Solution
Ensure that all interfaces are up and active, as described in
Chapter 3, “Performing the Initial Configuration.”
Problem
No route to network.
Solution
Check the routing table to see if a route exists to the network
where the interface is located. If no route exists, see
“Troubleshooting
Routing Problems”
on page 95.
Problem
Attached device does not have proper default route or routing
information.
Solution
If a local computer is unable to ping through an attached
appliance, the computer might contain either an invalid default route or
invalid routing information.
If you are using default routes from a computer, ensure that the local interface
is the default route for that computer.
Problem
The ARP table has old information.
Solution
If the ARP table has an old or invalid entry for the device
associated with the IP address you are attempting to ping, use Voyager to
delete the invalid entry.
For information about how to access Voyager and the related reference
materials, see
“Accessing Nokia Network Voyager”
on page 34
.
To delete the invalid entry
1.
Click Config.
2.
Click ARP in the Interfaces section.