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Menus Reference Manual: Edit Remote Site - IP Parameters Menu
3 - IP Enabled
The IP Enabled option enables or disables the Internet Protocol negotiations for this remote site. When a connection to
this remote site does not require IP routing, this option may be disabled causing IP not to be negotiated.
Default:
[enabled]
4 - NAT Enabled
Network Address Translation (NAT) is a technique which translates private IP addresses on a private network to valid
global IP addresses for access to the Internet. Network Address Port Translation (NAPT) translates both the IP address
and the port. The advantage of port translation is that more than one private IP address can be translated to the same
single global IP address. NAPT allows data exchanges initiated from hosts with private IP addresses to be sent to the
Internet via the P1700 using a single global IP address. Port translation can also be used from one private network to
another private network if the two networks have conflicting IP addresses.
A global IP address must be assigned to the WAN link upon which NAT is enabled for NAT to work. The global IP
address may be configured locally or negotiated if numbered links are enabled. If unnumbered links are enabled, the
router must accept an IP address for the WAN link from the remote site.
When NAT is enabled this router will not send RIP messages out. The router will be able to receive RIP requests. IP
pattern filters and Firewall use the non-translated IP address (i.e. the private IP address that is used on the private
network).
Remember: if NAT is enabled with IP addressing and Firewall is enabled, then the IP address for this remote site must be
in the firewall table.
Default:
[disabled]
Note:
In a raw 1490 frame relay environment, if NAT is changed from enabled to disabled, any static IP
addresses at the remote site will become invalid. In this case, clear the static routes entries with a
"Remove Static routes – all" command from the NAT Advanced Menu.
5 - Link IP Type
The Link IP Type option defines the type of link connection that will be established with the remote site PPP router. The
link may be numbered, in which both sides of the WAN connection have IP addresses assigned; or unnumbered, in which
the peer (remote partner PPP router) and the calling router use their device IP address.
When operating in unnumbered mode, each of the two IP routers operates as half of a complete router. The WAN
connection is considered a common internal data path with the IP routing actually taking place between the two remote
LANs.
When the link IP type is set to unnumbered, the Local IP Address option is not available. For an unnumbered link, the
local IP address is taken from the IP address assigned to this router in the Internet Set-Up menu.
Default:
[unnumbered]
Choices:
numbered, unnumbered
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