User's Manual Part 2

Troubleshooting MeshMAX 5054 Series User Guide
Troubleshooting Concepts for Subscriber Module
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• Must be running only during file upload and download
If the TFTP server does not upload or download files, it could mean:
• The TFTP server is not running
• The IP address of the TFTP server is invalid
• The upload or download directory is not correctly set
• The file name is not correct
Online Help Is Not Available
Online help is not available:
1. Make sure that the Help files are installed on your computer or server. See Step 12: Install Documentation and
Software.
2. Verify whether the path of the help files in the Web Interface refers to the correct directory. See Help Link.
Changes Do Not Take Effect
Changes made in the Web Interface do not take effect:
1. Restart your Web browser.
2. Log into the radio unit again and make changes.
3. Reboot the radio unit when prompted to do so.
Wait until the reboot is completed before accessing the Subscriber unit again.
VLAN Operation Issues
The correct VLAN configuration can be verified by “pinging” wired hosts from both sides of the device and the network
switch. Traffic can be “sniffed” on the wired (Ethernet) network. Packets generated by hosts and viewed on one of the
backbones should contain IEEE 802.1Q compliant VLAN headers when in Transparent mode. The VLAN ID in the
headers should correspond to one of the VLAN Management IDs configured for the unit in Trunk mode.
The correct VLAN assignment can be verified by pinging:
• The unit to ensure connectivity
• The switch to ensure VLAN properties
• Hosts past the switch to confirm the switch is functional
Ultimately, traffic can be “sniffed” on the Ethernet interface using third-party packages. Most problems can be avoided by
ensuring that 802.1Q compliant VLAN tags containing the proper VLAN ID have been inserted in the bridged frames. The
VLAN ID in the header should correspond to the assigned VLAN.
What if network traffic is being directed to a nonexistent host?
• All sessions are disconnected, traffic is lost, and a manual override is necessary.
• Workaround: You can configure the switch to mimic the nonexistent host.
Link Problems
While wireless networking emerges more and more, the number of wireless connections to networks grows every day.
The Tsunami MP.11 Subscriber unit is one of the successful product families used by customers today who enjoy the day
after day high-speed, cost-effective connections. To successfully use the connections, technicians must be able to
troubleshoot the system effectively. This section gives hints on how a Subscriber unit network could be analyzed in the
case of “no link,” a situation in which the customer thinks that the link is down because there is no traffic being passed.
The four general reasons that a wireless link may not work are related to: