Coyote Point Systems Equalizer, Installation And Administration Manual

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Chapter 7:Troubleshooting
96 Equalizer Installation and Administration Guide
Equalizer installation and configuration problems can usually be diagnosed using
standard network troubleshooting techniques. This section identifies some common
problems and the most likely causes.
Equalizer doesn’t boot
Possible cause: Hard drive not installed, seated, or locked.
✔ The removable hard-drive must be properly installed and locked before you boot
Equalizer.
Clients time out while trying to contact a virtual cluster
Possible cause: Equalizer is not gatewaying reply packets from the server.
✔ Log on to the server(s) and check the routing tables. Perform a
traceroute
from the
server to the client. Adjust the routing until Equalizer's address shows up in the
traceroute
output.
All packets sent from the server back to clients must pass through
Equalizer.
Possible cause: The test client is on the same network as the servers.
✔ If the test client is on the same network as the servers, the servers will likely try to
send data packets directly to the client, bypassing Equalizer. This can be corrected by
adding host routes on the servers so that the servers send their reply packets via
Equalizer.
Possible cause: No active servers in the virtual cluster.
✔ Check the Equalizer Summary page. Are there any servers in that virtual cluster? Are
all of the servers marked DOWN?
✔ Log onto the server an run the
netstat
command (Unix servers). If the
netstat
output shows connections in the SYN-RCVD state, it indicates that the server is not
forwarding its reply packets to Equalizer.
Possible cause: Equalizer is not active.
✔ Is Equalizer functioning? Try to
ping
the administration address. If you do not get a
response, see “Equalizer doesn’t respond to pings to the admin address” for more
troubleshooting information.
Can’t view Equalizer administration pages
Possible cause: Equalizer is not active.
✔ Is Equalizer functioning? Try to
ping
the administration address. If you do not get a
response, see “Equalizer doesn’t respond to pings to the admin address” for more
troubleshooting information.