Chapter 8: Troubleshooting
138
IP700 Series Installation Guide
Common Ethernet Problems—Connectivity with Attached Device
Cause
No link light.
Solution
You might have used the wrong cable. Use a crossover cable between an
IP700 Series appliance and a host, and a straight-through cable between
an appliance and a hub.
Cause
Unblinking data and activity LED.
Solution
You might have the wrong speed set. Verify that the speeds match on each
end of the Ethernet connection (10 Mbps or
100 Mbps).
Cause
Port not enabled.
Solution
Verify from the
Interface
page in Voyager that the interface is configured
as
ACTIVE
.
Cause
High collision rate on the hub.
Solution
Disconnect connections one at a time until the problem is isolated to one
computer and troubleshoot further.
Unable to Ping Through Appliance—No Connectivity Between Ports
This section covers connectivity issues that are isolated within an IP700
Series appliance or network.
Ping various network interfaces to pinpoint the problem. Use tcpdump to
help isolate the problem. Use tcpdump to verify that a packet is leaving or
entering a port. (For further information, see
“To View Packets Running
the IGMP Protocol” on page 148
.)
Cause
Interfaces not up.
Solution
Ensure that all interfaces are up and active, as described in
CHAPTER 4,
Configuring and Monitoring the IP700 Series Appliance
.
Cause
No route to network.
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