Allied Telesisメーカーx900-24 seriesの使用説明書/サービス説明書
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C613-16058-00 REV C www .alliedtelesis.com AlliedW ar e TM OS How T o | Intr oduction The A T -9900, x900-48, and x 900-24 series switches supp or t a po werful har dware based pack et-filtering facility .
Page 2 | AlliedW are™ OS How T o Note: Har dware Filters Intr oduction What information will y ou find in this document? This document contains the following: Intr oduction .......... .................................................................
Page 3 | AlliedW are™ OS How T o Note: Hardwar e Filters Cre ating dedicated har dware filte rs Cr eating dedicated hardwar e filters Befor e we get into the details of the filter creation, w e need to lo ok at the underlying pack et classification process.
Page 4 | AlliedW are™ OS How T o Note: Hardwar e Filters Cre ating dedicated har dware filte rs Configuring La y er 4 sour ce and destination por t number masks A common filtering re qui r ement is the ability to filter on a range of TCP or UDP port numbers.
Page 5 | AlliedW are™ OS How T o Note: Hardwar e Filters Cre ating dedicated har dware filte rs z When pack ets arrive at a customer port of a nested VLAN, the “i nner” parameters will match the attributes of the first tag in the packets.
Page 6 | AlliedW are™ OS How T o Note: Hardwar e Filters Cre ating dedicated har dware filte rs The logic of the operation of the hardwar e filters The operation of the filters follows the standar d A CL log ic: if a pack et matches an filter , the comparison pr ocess stops and the action attached to the filter is performed.
Page 7 | AlliedW are™ OS How T o Note: Hardwar e Filters Combining har dware filters and QoS Combining har dware filters and QoS The switch compar es the pack et with ev er y hard ware filter befor e it compares the pack et with any QoS flow group .
Page 8 | AlliedW are™ OS How T o Note: Hardwar e Filters Ho w many filters can you cr eate? Extra rules used when combin ing QoS and hardwar e filters In fact, QoS can cause the limit o n t he n u m be r o f ha r d wa r e f i l t e rs t o b e re d uc e d r a th e r m o re radically than might be initially evident.
Page 9 | AlliedW are™ OS How T o Note: Hardwar e Filters Ho w many filters can you cr eate? The following figur e shows the copies of these rules. When a QoS policy has been applied to ports 4 and 5.
Page 10 | AlliedW are™ OS How T o Note: Hardwar e Filters Ho w many filters can you cr eate? Pr oto col type—2 b ytes Ethernet format—2 bytes VLAN ID—2 bytes IP pr otocol type (TCP , UDP , etc.
Page 11 | AlliedW are™ OS How T o Note: Hardwar e Filters Ho w many filters can you cr eate? Oka y length For example, this set of filters would w ork: sour ce MAC ad dress source UDP port destinati.
Page 12 | AlliedW are™ OS How T o Note: Hardwar e Filters Ho w many filters can you cr eate? How to see the cur rent filter r esource usage on the s witch The sho w switch command outp uts a number of counters that display the cur rent usage of filtering r esources.
Page 13 | AlliedW are™ OS How T o Note: Hardwar e Filters Appendix A: How to use the la yer 4 mask in classifiers Appendix A: How to use the la y er 4 mask in classifiers This section describes the use of L4 mask in classifiers and gives some examples on L4 masks.
Page 14 | AlliedW are™ OS How T o Note: Hardwar e Filters Appendix A: How to use the la yer 4 mask in classifiers Example 1 : por ts 2000-2003 Let’ s say w e want to ha ve a UDP port range of 2000-2003, then the mask we need to h av e is: The changed bits from 2000-2003 ar e bolded.
Page 15 | AlliedW are™ OS How T o Note: Hardwar e Filters Appendix A: How to use the la yer 4 mask in classifiers Example 2: por ts 5004-5008 In some more complex situations, w e ma y need more than one classifier to cov er all the range w e want to .
Page 16 | AlliedW are™ OS How T o Note: Hardwar e Filters Appendix A: How to use the la yer 4 mask in classifiers So our bi ggest block fi ts into the range 5 1 2-767. The next second biggest block is 1 28 in our example … it should fit into 384-5 11 .
Page 17 | AlliedW are™ OS How T o Note: Hardwar e Filters Appendix A: How to use the la yer 4 mask in classifiers The following table sho ws the por t ranges for the largest blocks.
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Allied Telesis x900-24 seriesをまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはAllied Telesis x900-24 seriesの技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Allied Telesis x900-24 seriesの取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Allied Telesis x900-24 seriesで得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Allied Telesis x900-24 seriesを既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はAllied Telesis x900-24 seriesの不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Allied Telesis x900-24 seriesに関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちAllied Telesis x900-24 seriesデバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
