Cisco RV042G Router Manual PDF (Setup & Configuration Guide)

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IPv6 Transition

Cisco Small Business RV0xx Series Routers Administration Guide

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IPv6 Transition

When Dual-Stack IP is enabled on the

Network > Setup

page, a 6to4 tunnel is

enabled by default for IPv6 packets via 6to4 source/destination addressing

exchange. This feature allows the router to establish auto-tunnel in IPv4 network

(or a real IPv4 Internet connection) across two independent IPv6 networks. Use

the

Setup > IPv6 Transition

page to disable or enable this feature.

To open this page:

Click

Setup > IPv6 Transition

in the navigation tree.

Check the box to enable the 6to4 tunnel, or uncheck the box to disable it.

NOTE

Before navigating away from this page, click

Save

to save your settings, or click

Cancel

to undo them. Any unsaved changes are abandoned.

Next steps:

For a typical deployment, such as setting up a 6to4 tunnel between

your RV0xx Series router and a Cisco RV Series router at another site, you also

should complete the tasks listed below.

•

On the

DHCP->Router Advertisement

page, enable managed RA flags to

support auto-configuration of connected devices. Verify that your IPv6

devices acquire 6to4 prefixes. The prefixes will be in the following format:

2002:

::)

•

Temporarily disable the router firewall for testing of your 6to4 tunnel. On the

Firewall > General

page, choose

Disable

. To test the tunnel, attempt to ping

an IPv6 address at the remote location.

•

After verifying the tunnel as described above, enable the firewall and add

access rules on the

Firewall > Access Rules

page. For example, add a rule

to allow all traffic through the WAN interface where the source is a single IP

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IPv6 Transition

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address or a range of addresses on the local network and the destination is

a single IP address or a range of addresses on the remote network.

•

Complete the required tasks on the router at the other end of the 6to4

tunnel.

NOTE

For detailed application notes, see the documentation links in

Appendix H, “Where

to Go From Here.”

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Cisco Small Business RV0xx Series Routers Administration Guide

63

DHCP

Use the

DHCP

module to configure the settings for the DHCP server or DHCP

relay agent, and to view DHCP summary information.

If Dual-Stack IP is enabled on the

Network > Setup

page, you can configure IPv4

and IPv6 settings.

Refer to these topics:

•

Setting Up the DHCP Server or DHCP Relay, page 63

•

Viewing the DHCP Status Information, page 70

•

Router Advertisement (IPv6), page 71

Setting Up the DHCP Server or DHCP Relay

Use the

DHCP > DHCP Setup

page to configure this router as a DHCP (Dynamic

Host Configuration Protocol) server or as a DHCP relay agent.

A DHCP server automatically assigns available IP addresses to computers on your

network. An address is “leased” to a client for a specified time, and then it expires

and can be assigned to a different device. If a device needs to have an unchanging

IP addresses, you can add the device to the Static IP list. Optionally, you can use

the Static IP list to block access by devices that are not on the list or do not have

the correct IP address.

If you have another DHCP server on your network, or if you want to assign IP

addresses manually, you can disable the DHCP feature and enable DHCP Relay.

For more information, see

Enabling DHCP Server and DHCP Relay, page 64

.

NOTE

DHCP Relay is available only on the IPv4 tab. DHCPv6 Relay is not available.

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DHCP

Setting Up the DHCP Server or DHCP Relay

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To open this page:

Click

DHCP > DHCP Setup

in the navigation tree.

NOTE

Before navigating away from this page, click

Save

to save your settings, or click

Cancel

to undo them. Any unsaved changes are abandoned.

Enabling DHCP Server and DHCP Relay

Click the

IPv4

tab or the

IPv6

tab.

Note: The IPv6 tab is available only if you enabled Dual-Stack IP on the

Network >

Setup

page.

Enter the following settings:

•

Enable DHCP server:

Check the box to allow the router to dynamically

assign IP addresses to up to 50 connected devices. Uncheck the box if you

have another DHCP server on the network or you want to configure static IP

addresses for your network devices. If you enable this feature, enter the

settings in the

Dynamic IP

section of the page, as described below. Other

sections of this page are optional.

•

DHCP Relay (IPv4 only):

If you have another DHCP server, enable DHCP

Relay to allow this router to communicate the clients’ DHCP requests to the

DHCP server. The DHCP Relay mechanism allows the DHCP clients and the

DHCP server to be located on different networks. The DHCP clients will

send DHCP discover broadcast packets to get IP addresses from the DHCP

server. This router will act as DHCP Relay agent and send DHCP unicasts to

DHCP server.

Required:

Enter the

DHCP Server IP Address

. Other sections of this page

are optional.

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DHCP

Setting Up the DHCP Server or DHCP Relay

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NOTE

IPv4 only:

If you disable both DHCP server and DHCP Relay, configure each device

on your network with a static IP address, subnet mask, and DNS settings. Do not

assign the same IP address to different computers.

Dynamic IP (used for DHCP Server only)

•

Client Lease Time:

The Client Lease Time is the amount of time that a

network user is allowed to connect to the router with the current dynamic IP

address. Enter the amount of time in minutes. Valid values are 5~43,200

minutes. The default is 1440 minutes, which is 24 hours.

NOTE:

To receive an IP address from the DHCP server, a client device must

be configured to obtain an IP address automatically from a DHCP server. By

default, Windows computers are set to obtain an IP automatically.

•

Range Start

and

Range End:

Enter a starting IP address and an ending IP

address to create a range of IP addresses that can be assigned

dynamically. The range can include up to 50 IP addresses, which is the

maximum that the server can assign. Valid values are 100~149. Do not

include the router’s LAN IP address in this dynamic IP range. For example, if

the router uses the default LAN IP address,

192.168.1.1

, then the starting

value must be 192.168.1.2 or greater.

DNS (used for DHCP Server only)

Optionally, enter the IP address of a

DNS Server

. You also can enter a secondary

DNS server. Specifying a DNS server can provide quicker access than using a

DNS server that is dynamically assigned through the WAN settings. You can keep

the default setting of 0.0.0.0 to use a dynamically assigned DNS server.

WINS (used for DHCP Server, IPv4 Only)

Optionally, enter the IP address of a

WINS Server

.

Windows Internet Naming

Service resolves NetBIOS names to IP addresses. If you do not know the IP

address of the WINS server, keep the default, 0.0.0.0.

NOTE

To support NetBIOS for DHCP clients, the router uses two methods:

•

When the DHCP clients receive dynamic IP addresses from the router, it

automatically includes the information of the WINS server to support

NetBIOS.

•

If a client has a static IP address, then the IP address, subnet mask, default

gateway address, and DNS server settings must be configured on the

Internet Protocol (TCP/IP) page of the Windows operating system. Then the

WINS IP address must be configured on the advanced TCP/IP page. (For

more information, refer to Windows Help.)

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