Yamaha DME8o-ES Spécifications télécharger pdf (Page 13)

12. Troubleshooting

1. Find information.

Step number one: ﬁ nd the system’s documentation. With-

out the documentation it takes up to 10 times longer to

troubleshoot. The information should normally come as a

paper copy, or as pdf on a CD, USB stick or website.

If there is no information available then the starting point

is an inspection of the system - sketching the layer 1 dia-

gram, charting the MAC and IP addresses where possible.

If the system includes managed switches then the VLAN

structure must be charted as well - without it there’s no

way to tell what is connected to what. Often this means

calling many people to ﬁ nd the telephone number of the

network programmer.

2. Ping the default VLAN.

If the system contains switches then the second step is

to ping the default VLAN with an IP scanner, and com-

pare the live IPs with the documentation - assuming that

the default VLAN is used for network management and

control. If one IP is missing then that’s where to look

for a problem.

If the network doesn’t contain switches then skip step 2.

3. Launch ES Monitor.

Disconnect a cable from any ES100 device’s OUT port

and connect it to a computer, then launch ES Monitor.

ES Monitor will show all ES100 devices in the ring - if

one is missing then that’s where to look for a problem.

If all devices are alive then check the connection monitor

at the bottom of the ‘properties’ tab. The monitor must be

enabled in the ES Monitor preferences. The connection

monitor graph shows the network stability history of the

downstream and upstream connections. If any dip shows

up that’s where to look for a problem.

4) Check the top 3 of problem causes.

1) wordclock settings in MY card hosts.

2) loose patch cables

3) faulty long distance cables / connectors

ES Monitor

connection monitor

‘Angry IP scanner’

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Yamaha DME8o-ES Spécifications Page 13