Nokia EM7500 Installation Manual page 99

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General Troubleshooting Information
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 103.
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 Network
Voyager to delete the invalid entry.
For information about how to access Network Voyager and the related
reference materials, see "Using Nokia Network Voyager" on page 45.
To delete the invalid entry
1. Click Config.
2. Click ARP in the Interfaces section.
3. Click Display or Remove Dynamic ARP Entries.
4. Click Delete for the entry you want to delete.
5. Click Apply.
Problems with Multicast
Use tcpdump to view packets. To display packets for a specific interface, use
the following command: tcpdump . For more
-i interface proto igmp
IP390, 105i & 105s Security Platform Installation Guide 99