Motorola NVG510 User Manual download pdf (Page 16)

Configuring Static IP

This Section will walk you through configuring the RG for use of a Static IP

block. As mentioned earlier but repeated here for convieniance is an overview

in differences between ADSL service handling of Static IP service and AT&T U-

verse

• Static IP delivery –

• with your DSL service the DSL modem was often set to bridge mode, one IP address was used at the Access

device on o

ur side as the Gateway IP address and minus the Network and Broadcast IP addresses the rest

were for users to configure on their equipment with the customer device being the next logical hop out

from the Access device.

• With AT&T U-verse

the RG is now our access device for this scenario. It has its own IP for its WAN which is

a sticky dynamically assigned IP. A Virtual port is then created on the LAN side for the Public / Static IP

block and like the DSL Access device uses one IP from the block as the Gateway. The remaining are handed

to the customer device.

• A reason this is different is that the Static IP block is routed to the WAN IP (dynamically assigned) of the RG

and mapped t

o the MAC address of the RG for anti-spoofing purposes.

• The common misconception is that using DMZplus / IP Passt

hrough (depending on device) will completely

remove the RG as the firewall and the Gateway. Neither of them are the case in general. Those modes

pass the sticky DHCP assigned IP of the RG WAN connection, which is separate from the Static IP block , to

the assigned device. Also there is always a portion of the RG’s firewall functionality that remains in place by

design for our U-verse services. This will be discussed in later sections of the document.

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Motorola NVG510 User Manual Page 16