Motorola Netopia-3000 Router Manual PDF (Setup & Configuration Guide)

Page 171 / 351 Scroll up to view Page 166 - 170

171

Associating a Filter Set with an Interface

Once you have created a ﬁlter set, you must associate it with an interface in order for it to

be effective. Depending on its application, you can associate it with either the WAN (usu-

ally the Internet) interface or the LAN.

To associate an ﬁlter set with the LAN, return to the

Filter Sets

page.

Click the

Ethernet 100BT

link.

The

Ethernet 100BT

page appears.

From the pull-down menu, select the ﬁlter set to associ-

ate with this interface.

Click the

Submit

button. The Alert icon will appear in

the upper right corner of the page.

Click the Alert icon to go to the validation page, where

you can save your conﬁguration.

Page 172 / 351

172

You can repeat this process for both the WAN and LAN interfaces, to associate your ﬁlter

sets.

When you return to the Filter Sets page, it will display your interface associations.

Page 173 / 351

173

Policy-based Routing using Filtersets

Netopia Firmware Version 7.6 offers the ability to route IP packets using criteria other than

the destination IP address. This is called

policy-based routing

.

You specify the routing criteria and routing information by using IP ﬁltersets to determine

the forwarding action of a particular ﬁlter.

You specify a gateway IP address, and each packet matching the ﬁlter is routed according

to that gateway address, rather than by means of the global routing table.

In addition, the classiﬁer list in a ﬁlter includes the TOS ﬁeld. This allows you to ﬁlter on

TOS ﬁeld settings in the IP packet, if you want.

To use the policy-based routing feature, you

create a ﬁlter that forwards the trafﬁc.

•

Check the

Forward

checkbox. This will dis-

play the Force Routing options.

•

Check the

Force Route

checkbox.

•

Enter the

Gateway IP

address in standard

dotted-quad notation to which the trafﬁc should

be forwarded.

•

You can enter

Source

and

Destination IP

Address

(es) and

Mask

(s),

Protocol Type

,

and

Source

and

Destination Port ID

(s) for the

ﬁlter, if desired.

TOS ﬁeld matching

Netopia Firmware Version 7.6 includes two

parameters for an IP ﬁlter:

TOS

and

TOS

Mask

. Both ﬁelds accept values in the range 0

– 255.

Certain types of IP packets, such as voice or

multimedia packets, are sensitive to latency

introduced by the network. A delay-sensitive

packet is one that has the low-latency bit set in

the TOS ﬁeld of the IP header. This means that if such packets are not received rapidly, the

quality of service degrades. If you expect to route signiﬁcant amounts of such trafﬁc you

can conﬁgure your router to route this type of trafﬁc to a gateway other than your normal

gateway using this feature.

The TOS ﬁeld matching check is consistent with source and destination address matching.

Page 174 / 351

174

If you check the

Idle Reset

checkbox, a match on this rule will keep the WAN connection

alive by resetting the idle-timeout status.

The Idle Reset setting is used to determine if a packet which matches the ﬁlter will cause

an “instant-on” link to connect, if it is down; or reset its idle timer, if it is already up. For

example, if you wanted ping trafﬁc not to keep the link up, you would create a ﬁlter which

forwards a ping, but with the Idle Reset checkbox unchecked.

Example:

You want packets with the TOS low

latency bit to go through VC 2 (via gateway

127.0.0.3 – the Netopia Gateway will use

127.0.0.

x

, where

x

is the WAN port + 1) instead

of your normal gateway.

You would set up the ﬁlter as shown here.

☛

NOTE:

Default Forwarding Filter

If you create one or more ﬁlters that have a matching action of

forward

, then

action on a packet matching

none

of the ﬁlters is to block any trafﬁc.

Therefore, if the behavior you want is to force the routing of a certain type of

packet and pass all others through the normal routing mechanism, you must

Page 175 / 351

175

Policy-based Routing using Filtersets

conﬁgure one ﬁlter to match the ﬁrst type of packet and apply Force Routing. A

subsequent ﬁlter is required to match and forward all other packets.

Management IP trafﬁc

If the Force Routing ﬁlter is applied to source IP addresses, it may inadvert-

ently block communication with the router itself. You can avoid this by preced-

ing the Force Routing ﬁlter with a ﬁlter that matches the destination IP

address of the Gateway itself.

Rate

Popular Motorola Models

Famous Router IPs

Famous Router Companies

Bookmark Our Site

Share