Ubiquiti AirRouter User Manual

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Ubiquiti AirRouter User Manual Manual pdf 16 page image

14Ubiquiti Networks, Inc.Chapter 3: AirOS™AirRouter User Guide• Static Choose this option to assign the static IP settingsfor the bridge interface.Note: IP Address and Netmask settings shouldbe consistent with the address space of thenetwork segment where the AirRouter resides.- IP Address Enter the IP address of the device whileStatic Bridge IP Address mode is selected. This IP willbe used for AirRouter management purposes.- Netmask This is a value which when expanded intobinary provides a mapping to define which portionsof IP address groups can be classified as host devicesand network devices. Netmask defines the addressspace of the network segment where the AirRouterresides. 255.255.255.0 (or /24) Netmask is commonlyused on many C Class IP networks.- Gateway IP Typically, this is the IP address of the hostrouter which provides the point of connection to theInternet. This can be a DSL modem, Cable modem, ora WISP gateway router. The AirRouter will direct thepackets of data to the gateway if the destination hostis not within the local network.Note: In Bridge mode, the Gateway IP addressshould be from the same address space (on thesame network segment) as the AirRouter.- Primary DNS IP Enter the IP address of the PrimaryDNS (Domain Name System) server.- Secondary DNS IP Enter the IP address of theSecondary DNS (Domain Name System) server. Thisentry is optional and only used if the primary DNSserver is not responding.Spanning Tree Protocol Multiple interconnected bridgescreate larger networks using the IEEE 802.1d SpanningTree Protocol (STP), which is used for finding the shortestpath within network and to eliminate loops from thetopology.If enabled, the AirRouter Bridge will communicate withother network devices by sending and receiving BridgeProtocol Data Units (BPDU). STP should be turned off(selected by default) when the AirRouter is the only bridgeon the LAN or when there are no loops in the topologyas there is no need for the bridge to participate in theSpanning Tree Protocol in this case.Auto IP Aliasing Automatically generates an IP Addressfor the corresponding WLAN/LAN interface if enabled.The generated IP address is a unique Class B IP addressfrom the 169.254.X.Y range (Netmask 255.255.0.0) which isintended for use within the same network segment only.Auto IP always starts with 169.254.X.Y while X and Y arelast 2 digits from the MAC address of the device (i.e. if theMAC is 00:15:6D:A3:04:FB, Generated unique Auto IP willbe 169.254.4.251).IP Aliases IP aliases for the internal and external networkinterface can be configured. IP Aliases can be specifiedusing the IP Aliases configuration window which is openedwhen you click Configure.• IP The alternative IP address for the LAN or WLANinterface, which can be used for the routing or devicemanagement purposes.• Netmask The network address space identifier for theparticular IP Alias.• Comments Field used for a brief description of thepurpose of the alias.• Enabled Enables or disables the particular IP Alias. Alladded IP Aliases are saved in the system configurationfile, however only the enabled IP Aliases are active onthe AirRouter.Newly IP Aliases can be saved by click the Save buttonor discarded by clicking the Cancel button in the Aliasesconfiguration window.Firewall SettingsFirewall functionality on the bridge interface can beenabled by selecting Enable Firewall. Bridge Firewallrules can be configured, enabled or disabled while usingFirewall configuration window which opens when youclick Configure.