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4.

For additional security with RIPv2 check

Enable Password

and enter a password.

Dynamic routing does not required the additional security. RIP v2 provides simple plain-text

password-based authentication to RIP packets. The

Enable Password

field is disabled if

RIP v1 protocol is selected.

5.

From the

Interface

Direction

drop down select the appropriate direction for each interface.

Direction

determines the direction that RIP routes will be updated.

In

The router will only incorporate received RIP information.

Out

The router will only send out RIP information.

Both

The router will incorporate received RIP information and send out updated RIP

information.

None

Dynamic routing is disabled for this interface. Use when dynamic routing is

enabled for other interfaces.

To match the example above:

•

LAN group 1

:

Both

•

LAN group 2

:

Both

You also need to enable dynamic routing on the routers 2 and 3.

6.

Click

Apply

The Apply button will temporarily save this connection. To make the change permanent, click

Tools

(at the top of the page) and select

System Commands

. On the

System Commands

page, click

Save All

.

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Quality of Service (QoS)

Quality of Service permits network administrators to prioritize how packets are handled, so that

information with differing requirements, voice, video and data, will work properly. Network

administrator configure routers to handle the different priority packets, however different networks

use differing QoS marking.

Note:

QoS pages are for use by network administrators or Internet Service Providers

(ISP). Users should not configure the Policy Database, Ingress, Egress or Shaper

pages unless directed to do so by their ISP.

A ToS network (Type of Service) uses flags in the IP header to set priorities. A DSCP network

(Differentiated Services Code Point) uses a field in an IP packet to describe different levels of

service to assign to traffic. A VLAN (Virtual LAN as used with Level 2 bridges) uses priority bit in

the VLAN header. WLAN use WLAN QoS header.

To work with the differing means of prioritizing packets and bandwidth, the 6381 maps the other

priority schemes either to or from the CoS priority that it uses. Upon ingress (when the packet

arrives on the WAN or LAN interface of the 6381) the priority is translated to CoS. Upon egress

(when the packet leaves on the WAN or LAN interface of the 6381) the priority is translated from

CoS. These mappings are set by a traffic conditioning agreement (TCA) for each interface:

Ingress = domain mapping to CoS, Egress = CoS mapping to domain. There are also options for

honoring (trusted mode) or not honoring (untrusted mode).

The 6381 uses a Class of Service (CoS) to define priorities. The 6381 uses six classes of CoS:

CoS1, CoS2, CoS3, CoS4, CoS5, and CoS6. CoS1 is the highest priority and CoS6 the lowest.

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Terms:

•

Ingress: Packets arriving into the RG from a WAN/LAN interface.

•

Egress: Packets sent from the RG to a WAN/LAN interface.

•

Trusted mode: Honors the domain mapping (ToS byte, WME, WLAN user priority).

•

Untrusted mode: Does not honor domain mapping. This is the default QoS setting.

Forwarding rules based on CoS are:

•

CoS1 has absolute priority and is used for expedited forwarding (EF) traffic. This is always

serviced till completion.

•

CoS2-CoS5 are used for assured forwarding (AF) classes. They are serviced in a strict round

robin manner using the following priority scheme:

CoS2 > CoS3 > CoS4 > CoS5

•

CoS6 is for best effort (BE) traffic. This is only serviced when there is no other class of

service. If QoS is not enabled on your RG, all traffic will be treated as best effort.

QoS is defined in the following four GUI pages:

•

Policy Database

for configuring QoS for multiple connections

•

Ingress

for ingress mapping from an outside domain

•

Egress

for egress mapping to an outside domain

•

Shaping

for determining the servicing of the CoS queues including rate limiting.

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Policy Database

The Policy Database page allows you to configure QoS for multiple WAN connections; you can

classify packets based on fields in the packet. The

Ingress

and

Egress

pages allow you to

configure QoS per interface.

Fields that can be configured for setting policies:

Field

Description

Ingress Interface

The incoming traffic interface for a Policy Routing rule. Selections include LAN

interfaces, WAN interfaces, Locally generated (traffic), and not applicable.

Examples of Locally generated traffic are: voice packets, packets generated by

applications such as DNS, DHCP or other applications.

Destination Interface

The outgoing traffic interfaces for a Policy Routing rule. Selections include LAN

Interfaces and WAN interfaces.

DiffServ Code Point

The diffServ code point (DSCP) field value ranges from 1 to 255. This field

cannot be configured alone; additional fields like IP, Source MAC, and/or

Ingress Interface should be configured.

Class of Service

The selections are (in the order of priority): CoS1, CoS2, CoS3, CoS4, CoS5,

CoS6, and N/A.

Source IP

The IP address of the traffic source. (Wild cards are allowed.)

(Source)

Mask

The source IP netmask. This field is required if the source IP has been entered.

(Wild cards are allowed.)

Destination IP

The IP address of the traffic destination. (Wild cards are allowed.)

(Destination)

Mask

The netmask of the destination. This field is required if the destination IP has

been entered. (Wild cards are allowed.)

Protocol

The selections are TCP, UDP, ICMP, Specify, and none. If you choose Specify,

you need to enter the protocol number in the box next to the Protocol field.

This field cannot be configured alone; additional fields like IP, Source MAC,

and/or Ingress Interface must also be configured.

The

Protocol

field is also required if the source port or destination port has

been entered.

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95

Source Port

The source protocol port. You cannot configure this field without entering the

protocol first.

Destination Port

The destination protocol port or port range. You cannot configure this field

without entering the protocol first.

Source MAC

The MAC address of the traffic source.

Local Routing Mark

The

Local Routing Mark

field is enabled only when Locally Generated is

selected in the

Ingress Interface

field. The mark for DNS traffic generated by

different applications are described below:

•

Dynamic DNS: 0xE1

•

Dynamic Proxy: 0xE2

•

Web Server: 0xE3

•

MSNTP: 0xE4

•

DHCP Server: 0xE5

•

IPtables Utility: 0xE6

•

PPP Daemon: 0xE7

•

IP Route: 0xE8

•

ATM Library: 0xE9

•

NET Tools: 0xEA

•

RIP: 0xEB

•

RIP v2: 0xEC

•

UPNP: 0xEE

•

Busybox Utility: 0xEF

•

Configuration Manager: 0xF0

•

DropBear Utility: 0xF1

•

Voice: 0

Policy routing if selected, uses the egress interface. The ingress interface is not applicable if

policy routing is used.

Currently routing algorithms make decision based on destination address, i.e., only Destination IP

address and subnet mask is supported. The Policy Routing page enables you to route packets on

the basis of various fields in the packet. The following fields can be configured for Policy Routing:

•

Destination IP address/mask

•

Source IP address/mask

•

Source MAC address

•

Protocol (TCP, UDP, ICMP, etc)

•

Source port

•

Destination port

•

Incoming interface

•

DSCP