Cambium Networks PMP 450, Configuration And User'S Manual

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PMP 450 Configuration and User Guide Task 2: Configuring IP and Ethernet
interfaces
pmp-0050 (May 2012)
2-11
SM NAT DNS Considerations
SM DNS behavior is different depending on the accessibility of the SM. When NAT is disabled the DNS
configuration that is discussed in this document is tied to LAN1 interface, and only functions if the device is
publicly accessible. When NAT is enabled the DNS configuration that is discussed in this document is tied to
the RF Remote Configuration Interface, which must be enabled to utilize DNS Client functionality. Note that
the WAN DNS settings when NAT is enabled are unchanged with the addition of the management DNS
feature discussed in this document.
Table 2 SM DNS Options with NAT Disabled
NAT
Configuration Management
Interface
Accessibility DHCP Status DNS Status
NAT Disabled Local DHCP Disabled DNS Disabled
DHCP Enabled DNS Disabled
Public DHCP Disabled DNS Static
Configuration
DHCP Enabled DNS from DHCP or
DNS Static
Configuration
In the NAT tab of an SM with NAT disabled, you may set the following parameters.
Table 3 SM with NAT disabled - NAT attributes
Attribute Meaning
NAT Enable/Disable This parameter enables or disabled the Network Address Translation
(NAT) feature for the SM. NAT isolates devices connected to the
Ethernet/wired side of an SM from being seen directly from the wireless side
of the SM. With NAT enabled, the SM has an IP address for transport
traffic separate from its address for management, terminates transport
traffic, and allows you to assign a range of IP addresses to devices that are
connected to the Ethernet/wired side of the SM
When NAT is enabled, VLANs are not supported on the wired side of that
SM. You can enable NAT in SMs within a sector where VLAN is enabled in
the AP, but this may constrain network design
WAN Interface, Connection
Type This parameter is not configurable when NAT is disabled.
WAN Interface, IP Address This field displays the IP address for the SM. DHCP Server will not
automatically assign this address when NAT is disabled.