Troubleshooting guide

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Typical Network Configurations
DHCP Server: The default address information and options may need to
be changed when installing the controller on a network with multiple
subnets. If you are using an external DHCP server, disable the one in the
controller. For programming instructions, refer to the System
Administration Tool Online Help.
CXi/CXi II and MXe Configuration Requirements
Controller
• Internet Gateway (WAN port)
- Use of the Internet Gateway is optional, but if you wish to use the
Internet Gateway, you must specify the address assignment
(PPPoE, DHCP client, static or Applications Processor Card), and
program the firewall.
• Layer 2 switch
- Depending on which IP addresses are already used in the network,
you may have to change IP addresses to prevent IP conflicts. IP
address changes may also be required to allow for traffic between
the local and remote subnets, and to ensure quality of service for
phone calls with VLAN prioritization.
• DHCP Server
- The default address information and options may need to be
changed when installing the controller on a network with multiple
subnets. If you are using an external DHCP server, disable the one
in the controller.
Other network devices
• External DHCP Server
- If you are using an external DHCP server, make sure that it is
programmed to provide addresses and options to all devices that
require them.For details, refer to “To use an alternative DHCP
server:” on page 78. Also, make sure to disable the DHCP server
in the controller.
• External Layer 2 Switches
- If a VLAN-capable switch is connected to the 10/100/1G port on the
MXe, program its uplink port to send and receive tagged packets
Tip: For programming instructions, refer to the System Administration Tool
Online Help.