Troubleshooting Network Connections; Testing Network Connectivity; Pinging An Ip Address - Brocade Communications Systems MLX Series Installation Manual

Troubleshooting network connections

Observe connection LEDs to determine if network connections are functioning properly.
connections, the desired state of each LED, possible abnormal states of each LED, and what to do if an LED indicates an abnormal state.
TABLE 30 Network connection-related LED states
LED Desired Meaning
state
Interface module
Link On A link is
established with
the remote port.
Active On or The port is
blinking transmitting and
receiving user
packets.
If a problem persists after taking these actions, contact Brocade Technical Support.

Testing network connectivity

After you cable the fiber-optic transceivers, you can test connectivity to other network devices by pinging those devices. You also can
perform traceroutes.

Pinging an IP address

To verify that the router can reach another device through the network, enter a command such as the following at any level of the CLI.
Brocade# ping 192.33.4.7
Syntax: ping <ip addr> | <hostname> [source <ip addr>] [count <num>] [timeout <msec>] [ttl <num>] [size <byte>] [quiet]
[numeric] [no-fragment] [verify] [data <1-to-4 byte hex>] [brief]
Beginning with version 03.6.00 of the Multi-Service IronWare software, the maximum allowable size is 9170 bytes.
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Abnormal Meaning or action
state
Off A link is not established with the remote port. Try the following:
•
Verify that the connection to the other network device has
been properly made, and that the other network device is
powered on and operating correctly.
•
Verify that the transmit port on a router is connected to
the receive port on the other network device, and that the
receive port on the router is connected to the transmit port
on the other network device. If you are not certain, remove
the two cable connectors and reinsert them in the port
connector, reversing their order.
•
Dust may have accumulated in the cable connector or
port connector. For information about cleaning the
connectors, refer to
connectors" on page 208.
•
If these actions do not resolve the problem, try using a
different port or a different cable.
Off for an The port is not transmitting or receiving user packets. Try the
extended following:
•
period.
Check the Link LED to make sure the link is still
established with the remote port. If not, take the actions
described in the Meaning or Action column for the Link
LED.
•
Verify that the port has not been disabled through a
configuration change. You can use the CLI. If you have
configured an IP address on the device, you also can use
the Web management interface or Brocade Network
Advisor.
Table 30
"Cleaning fiber-optic ports and
Testing network connectivity
lists the LEDs related to the network
209