Nokia IP380 Installation Guide - Page 109

Problems with Multicast, Problem, Solution, To delete the invalid entry

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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 105. 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 "Accessing Nokia Network Voyager" on page 30. 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 -i interface proto igmp. For more Nokia IP300 Series Security Platform Installation Guide 101

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General Troubleshooting Information
Nokia IP300 Series Security Platform Installation Guide
101
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 105.
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
“Accessing Nokia Network Voyager”
on page 30.
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
-i
interface
proto igmp
. For more