Cisco RV-120W Router Manual PDF (Setup & Configuration Guide)

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Configuring Networking

Configuring the LAN (Local Network) Settings

Cisco RV120W Administration Guide

32

2

If you want to edit the DHCP behavior of this VLAN:

a.

In the DHCP Section, in the DHCP Mode field, choose one of the following:

•

DHCP Server—Choose this to allow the VLAN to act as the DHCP server in

the network. Enter the following information:

-

Domain Name—Enter the domain name for your network (optional).

-

Starting and Ending IP Address—Enter the first and last of the

contiguous addresses in the IP address pool. Any new DHCP client

joining the LAN is assigned an IP address in this range. You can save part

of the range for PCs with fixed addresses. These addresses should be

in the same IP address subnet as the VLAN’s IP address.

-

Primary and Secondary DNS Server—DNS servers map Internet

domain names (for example, www.cisco.com) to IP addresses. Enter the

server IP addresses in these fields if you want to use different DNS

servers than are specified in your WAN settings.

-

Lease time—Enter the duration (in hours) for which IP addresses are

leased to clients.

•

DHCP Relay—Choose this if you are using a DHCP relay gateway. The relay

gateway transmits DHCP messages between multiple subnets. Enter the

address of the relay gateway in the Relay Gateway field.

•

None—Use this to disable DHCP on the VLAN.

In the LAN Proxy section, to enable the VLAN to act as a proxy for all DNS requests

and communicate with the ISP's DNS servers, check the Enable box.

STEP

4

Click Save.

Configuring Static DHCP

You can configure a static IP Address and MAC Address for a known computer or

device on the LAN network from the LAN Interface menu.

STEP 1

Choose Networking > LAN (Local Network) > Static DHCP (LAN).

STEP

2

Click Add.

STEP

3

Enter the IP address of the device.

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Configuring Networking

Configuring the LAN (Local Network) Settings

Cisco RV120W Administration Guide

33

2

STEP

4

Enter the MAC address of the device. The format for the MAC Address is

XX:XX:XX:XX:XX:XX where X is a number from 0 to 9 (inclusive) or an alphabetical

letter between A and F (inclusive).

NOTE

The IP Address assigned should be outside the pool of the DHCP addresses

configured. The DHCP pool is treated as generic pool and all reserved IPs should

be outside this pool. The DHCP server will then serve the reserved IP address

when the device using the corresponding MAC address requests an IP address.

STEP

5

Click Save.

Configuring Advanced DHCP Settings

Configuring Automatic Configuration Download

You can configure the Cisco RV120W to download a configuration file from a TFTP

server. Upon rebooting, the firewall downloads the file.

To configure automatic configuration download:

STEP 1

Choose Networking > LAN (Local Network) > Advanced DHCP Configuration.

STEP

2

Check Enable to enable downloading of configuration files.

STEP

3

Choose the TFTP server type:

•

Host Name—Enter the host name of the TFTP server in the TFTP server host

name field.

•

Address—Enter the IP address of the TFTP server in the TFTP Server IP

field.

STEP

4

Click Save.

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Configuring Networking

Configuring Routing

Cisco RV120W Administration Guide

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2

Adding a DHCP Client to Configuration File Map

This table displays the list of currently configured DHCP Client MAC address to

configuration filename mappings. It has the following fields:

•

MAC Address

•

Configuration Filename

Click Add to add a new DHCP Client MAC address to configuration filename

mapping. Click Edit to edit the MAC address or boot filename for a particular entry.

Click Delete to delete a particular entry.

Viewing DHCP Leased Clients

You can view a list of endpoints on the network (identified by MAC address) and

see the IP address assigned to them by the DHCP server. The VLAN of the

endpoint is also displayed.

STEP 1

Choose Networking > LAN > DHCP Leased Clients (LAN).

STEP

2

The list of endpoints is displayed; you cannot edit this list.

Configuring Routing

Choosing the Routing Mode

The Cisco RV120W provides two different routing modes. Network Address

Translation (NAT), or gateway routing, is a technique that allows several endpoints

on a LAN to share an Internet connection. The computers on the LAN use a

“private” IP address range while the WAN port on the firewall is configured with a

single “public” IP address. The Cisco RV120W translates the internal private

addresses into a public address, hiding internal IP addresses from computers on

the Internet. If your ISP has assigned you a single IP address, you want to use NAT

so that the computers that connect through the Cisco RV120W are assigned IP

addresses from a private subnet (for example, 192.168.10.0).

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Configuring Networking

Configuring Routing

Cisco RV120W Administration Guide

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2

The other routing mode, “router,” is used if your ISP has assigned you multiple IP

addresses so that you have an IP address for each endpoint on your network. You

must configure either static or dynamic routes if you use this type of routing. See

Configuring Static Routes, page 37

, or

Configuring Dynamic Routing, page 38

.

To choose your routing mode:

STEP 1

Select Networking > Routing > Routing Mode.

STEP

2

Click the box next to the type of routing to configure.

STEP

3

Click Save.

NOTE

If you have already configured DMZ or firewall settings on your firewall in gateway

(NAT) mode, selecting “router” changes those settings back to the default.

Viewing Routing Information

To view routing information your network:

STEP 1

Choose Networking > Routing > Routing Table.

STEP

2

Next to the type of network you have, click Display.

Information about your network routing is displayed, including the following:

IPv4 Routing Table

•

Destination—Destination host/network IP address for which this route is

added.

•

Gateway—The gateway used for this route.

•

Genmask—The netmask for the destination network.

•

Flags—For debugging purpose only; possible flags include:

-

UP—Route is up.

-

Host—Target is a host.

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Configuring Networking

Configuring Routing

Cisco RV120W Administration Guide

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2

-

Gateway—Use gateway.

-

R—Reinstate route for dynamic routing.

-

D—Dynamically installed by daemon or redirect.

-

M—Modified from routing daemon or redirect.

-

A—Installed by

addrconf

.

-

C—Cache entry.

-

!—Reject route.

•

Metric—The distance to the target (usually counted in hops).

•

Ref—Number of references to this route.

•

Use—Count of lookups for the route. Depending on the use of -F and -C, this

is either route cache misses (-F) or hits (-C).

•

Interface—Interface to which packets for this route will be sent.

•

Type—Type of routing used (RIP or static).

IPv6 Routing Table

•

Destination—Destination host/network IP address for which this route is

added.

•

Next Hop—IP address of an adjacent or intermediate host or router through

which traffic must flow before reaching its ultimate destination.

•

Flags—For debugging purpose only; possible flags include:

-

UP—Route is up.

-

Host—Target is a host.

-

Gateway—Use gateway.

-

R—Reinstate route for dynamic routing.

-

D—Dynamically installed by daemon or redirect.

-

M—Modified from routing daemon or redirect.

-

A—Installed by

addrconf

.

-

C—Cache entry.

-

!—Reject route.

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