Cambium Networks PMP 450 AP, Configuration Manual

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Chapter 5: Troubleshooting Troubleshooting procedures
Page
5-10
Module does not establish Ethernet connectivity
To troubleshoot a loss of Ethernet connectivity, perform the following steps:
Procedure 33 Troubleshooting loss of Ethernet connectivity
1 Verify that the connector crimps on the Ethernet cable are not loose.
2 Verify that the Ethernet cable is not damaged.
3 If the Ethernet cable connects the module to a network interface card (NIC), verify that
the cable is pinned out as a straight-through cable.
4 If the Ethernet cable connects the module to a hub, switch, or router, verify that the
cable is pinned out as a crossover cable.
5 Verify that the Ethernet port to which the cable connects the module is set to auto-
negotiate speed.
6 Verify VLAN configuration in the network, which may cause loss of module access if the
accessing device is on a separate VLAN from the radio.
7 Power cycle the module.
RESULT:
Approximately 25 seconds after the power cycle, the green LED labeled LNK
must light up to indicate that the link has been established. If the orange LED labeled
SYN is lit instead, then the module is in Alignment mode because the module failed to
establish the link.
8 In this latter case and if the module has encountered no customer-inflicted damage,
then request an RMA for the module.