Allied Telesis x900-24 series User Manual

Allied Telesis

Page 2 | AlliedWare™ OS How To Note: Hardware Filters

Introduction

What information will you find in this document?

This document contains the following:

Introduction .............................................................................................................................................. 1

Which products and software versions does this information apply to? ............................ 2

Creating dedicated hardware filters .................................................................................................... 3

Configuring packet classification ................................................................................................... 3

Configuring Layer 4 source and destination port number masks ................................ 4

Configuring “inner” parameters for nested VLANs ........................................................ 4

Creating hardware filters ............................................................................................................... 5

The logic of the operation of the hardware filters ................................................................... 6

The effects of the action parameters .......................................................................................... 6

Combining hardware filters and QoS ................................................................................................. 7

How many filters can you create? ........................................................................................................ 7

1. The filter rules table ................................................................................................................... 7

Extra rules used when combining QoS and hardware filters ........................................ 8

2. The profile (mask) ....................................................................................................................... 9

Are there enough bytes for your set of filters? .............................................................. 10

Some protocols also use filters, so use some of the length ........................................ 11

How to see the current filter resource usage on the switch .............................................. 12

Appendix A: How to use the layer 4 mask in classifiers .............................................................. 13

Example 1: ports 2000-2003 ....................................................................................................... 14

Points to remember ...................................................................................................................... 14

Example 2: ports 5004-5008 ....................................................................................................... 15

Example 3: ports 333-777 ............................................................................................................ 15

Which products and software versions does this information
apply to?

z

Products: AT-8948, AT-9900, x900-48, and x900-24 series

z

Software versions: 2.7.3 and above

Hardware filters are also available on Layer 3 switches running the AlliedWare Plus OS. See
the following How To Note:

z

How To Configure Hardware Filters on SwitchBlade x908, x900-12XT/S, and x900-24 Series
Switches

This Note is available from

www.alliedtelesis.com/resources/literature/howto_plus.aspx.