PTN基礎(chǔ)—— PWE3技術(shù)

1、 copyright 2008 huawei technologies co., ltd. all rights reserved. internal use only ptnptn基礎(chǔ)基礎(chǔ) pwe3 pwe3技術(shù)技術(shù) copyright 2008 huawei technologies co., ltd. all rights reserved. page 1 前言 lpwe3是指在分組交換網(wǎng)絡(luò)psn中盡可能真是地模仿atm，幀 中繼，以太網(wǎng)，低速tdm電路和sonet/sdh等業(yè)務(wù)的基本行 為和特征的一種二層業(yè)務(wù)錄取技術(shù)。 l通過pwe3技術(shù)可以將傳統(tǒng)的網(wǎng)絡(luò)和分組交換網(wǎng)絡(luò)互連起來， 從而實

2、現(xiàn)資源的共享和網(wǎng)絡(luò)的拓展。 copyright 2008 huawei technologies co., ltd. all rights reserved. page 2 培訓目標 l學完本課程后，您應(yīng)該能： p理解pwe3的基本概念 p描述tdm業(yè)務(wù)的實現(xiàn)過程 p描述atm業(yè)務(wù)的實現(xiàn)過程 p描述ethenet業(yè)務(wù)的實現(xiàn)過程 p列出pwe3技術(shù)的典型應(yīng)用 copyright 2008 huawei technologies co., ltd. all rights reserved. page 3 目 錄 l1. pwe3概述 l2. tdm業(yè)務(wù)仿真 l3. atm業(yè)務(wù)仿真 l4. ehre

3、net業(yè)務(wù)仿真 l5. pwe3的典型應(yīng)用 copyright 2008 huawei technologies co., ltd. all rights reserved. page 4 目 錄 l1. pwe3概述概述 l2. tdm業(yè)務(wù)仿真 l3. atm業(yè)務(wù)仿真 l4. ehrenet業(yè)務(wù)仿真 l5. pwe3的典型應(yīng)用 copyright 2008 huawei technologies co., ltd. all rights reserved. page 5 pwe3pwe3基本業(yè)務(wù)流程基本業(yè)務(wù)流程 lpwe3:pseudo-wire emulation edge to edge

4、 vpn1 site3 vpn2 site4 vpn1 site1 vpn2 site3 pe2pe1 ce1 ce2 ce4 ce3 tunnel forward forward copyright 2008 huawei technologies co., ltd. all rights reserved. page 6 pwe3pwe3的基本概念（一）的基本概念（一） l接入鏈路（ac）；attachment circuit l轉(zhuǎn)發(fā)器（forwarder） l隧道（tunnel） l封裝（encapsutation） lpw信令協(xié)議（pw signaling） copyright 200

5、8 huawei technologies co., ltd. all rights reserved. page 7 pwe3pwe3的基本概念（二）的基本概念（二） lpw:pseudo wire l用戶邊緣設(shè)備（ce）：custom edge l運營商邊緣設(shè)備（pe）；provider edge router l控制字（cw）:control word l虛電路鏈接驗證（vccv）：virtual circuit connectivity verification copyright 2008 huawei technologies co., ltd. all rights reserv

6、ed. page 8 pw的功能 l封裝來自ce的業(yè)務(wù) p講防撞好的業(yè)務(wù)傳遞到傳輸鏈接 p在隧道兩端簡歷pw p實現(xiàn)pw相關(guān)的qos； p管理pw端的信令，時間和序列等 ppw狀態(tài)機告警管理 copyright 2008 huawei technologies co., ltd. all rights reserved. page 9 pw的分類 l靜態(tài)pw p靜態(tài)pw（static pw）不適用信令協(xié)議進行參數(shù)協(xié)商，而是通過 命令手工制定相關(guān)信息，數(shù)據(jù)通過隧道在pe之間的傳遞。 l動態(tài)pw p動態(tài)pw時只通過信令協(xié)議建立起來的pw p在optix ptn中，建立pw的信令協(xié)議時ldp cop

7、yright 2008 huawei technologies co., ltd. all rights reserved. page 10 控制字（控制字（cwcw） l控制字（cw）：control word p4字節(jié)長：在psn網(wǎng)絡(luò)里傳遞報文信息 tunnel label (static/rsvp-te)expsttl pw label (static/ldp)expsttl rsvdflag00lengthsequence number emulated service copyright 2008 huawei technologies co., ltd. all rights re

8、served. page 11 問 題 lpw主要有哪些功能 l控制字cw在pwe3中是必須的嗎？ copyright 2008 huawei technologies co., ltd. all rights reserved. page 12 目 錄 l1. pwe3概述 l2. tdm業(yè)務(wù)仿真業(yè)務(wù)仿真 l3. atm業(yè)務(wù)仿真 l4. ehrenet業(yè)務(wù)仿真 l5. pwe3的典型應(yīng)用 copyright 2008 huawei technologies co., ltd. all rights reserved. page 13 tdm業(yè)務(wù)概述 ltdm time division mu

9、ltiplex p傳輸通道被劃分為不同的時隙 p不同的時隙可用來傳遞不同的用戶數(shù)據(jù) ts n ts 2 ts 1 ts n ts 2 ts 1 ts n ts 2 ts 1 copyright 2008 huawei technologies co., ltd. all rights reserved. page 14 e1e1業(yè)務(wù)介紹（一）業(yè)務(wù)介紹（一） le1 p屬于tdm業(yè)務(wù)的一種 p傳遞通道被劃分為32個時隙 p一個時隙一次傳遞8bits的數(shù)據(jù) p每秒傳輸8000個e1幀 pe1寬帶計算如下： n32（timeslots/frame*8(bits/timeslot) n*8000(fr

10、ames/s)=2048(bits/s)=2.048(mbps)=32*64(kbps) copyright 2008 huawei technologies co., ltd. all rights reserved. page 15 e1e1業(yè)務(wù)介紹（二）業(yè)務(wù)介紹（二） lunframed e1 p把31個時隙作為一個整數(shù)來傳遞用戶數(shù)據(jù) lframed e1 p時隙0用來傳遞信令和幀分隔符 p時隙1到31用來傳遞不同用戶的業(yè)務(wù)數(shù)據(jù) copyright 2008 huawei technologies co., ltd. all rights reserved. page 16 tdmtdm

11、仿真業(yè)務(wù)要素仿真業(yè)務(wù)要素 l使用偽線方式在psn網(wǎng)絡(luò)上仿真?zhèn)魉蛅dm業(yè)務(wù)，主要包括以下 幾個要素需要被運載到偽線的另一端 ptdm業(yè)務(wù)數(shù)據(jù) ptdm業(yè)務(wù)數(shù)據(jù)的幀格式 ptdm業(yè)務(wù)在ac側(cè)告警和信令 ptdm同步定時信息 copyright 2008 huawei technologies co., ltd. all rights reserved. page 17 tdmtdm電路仿真封裝協(xié)議電路仿真封裝協(xié)議 lsatop協(xié)議 pstructure-agnostic tdm over packet prfc4553 lcesopsn協(xié)議 pstructur-aware tdm circuit

12、emutation service over packet switcher network copyright 2008 huawei technologies co., ltd. all rights reserved. page 18 satop 封裝 exp 0exp 0ttlttl exp 1exp 1ttlttl control wordcontrol word rtp headerrtp header time stamptime stamp ssrc identifiefssrc identifief e1 frame 1e1 frame 1 e1 frame 2e1 fram

13、e 2 tunnel label pw label copyright 2008 huawei technologies co., ltd. all rights reserved. page 19 cesopsn封裝 tunnel labelex p 0 ttl pw labelex p 1 ttl control word rtp header time stamp ssrc identifief time slot 1time slot 4 time slot 5time slot n(frame 1#) time slot 1time slot 2time slot 3time slo

14、t 4 time slot 5 time slot n(frame 2#.) copyright 2008 huawei technologies co., ltd. all rights reserved. page 20 cesces業(yè)務(wù)的應(yīng)用業(yè)務(wù)的應(yīng)用 bts1 bts2 bsc pe3 pe1 pe2 e2 e1 e1 c stm-1 pw ip/mpls pw pw copyright 2008 huawei technologies co., ltd. all rights reserved. page 21 cewcew業(yè)務(wù)的時鐘類型業(yè)務(wù)的時鐘類型 l外部時鐘方式 p基準時鐘接入

15、位置：pe p承載以太網(wǎng)不需要傳輸時鐘。 l自適應(yīng)時鐘方式 p不需要基準時鐘 p承載以太網(wǎng)不需要傳輸時鐘。 copyright 2008 huawei technologies co., ltd. all rights reserved. page 22 問 題 l請累出satop協(xié)議和cesopsn協(xié)議的不同點. copyright 2008 huawei technologies co., ltd. all rights reserved. page 23 目 錄 l1. pwe3概述 l2. tdm業(yè)務(wù)仿真 l3. atm業(yè)務(wù)仿真業(yè)務(wù)仿真 l4. ehrenet業(yè)務(wù)仿真 l5. pwe3

16、的典型應(yīng)用 copyright 2008 huawei technologies co., ltd. all rights reserved. page 24 atmatm基本概念（一）基本概念（一） latm信元：信元：atm cells l虛電路：虛電路：vc pvirtual circuit l永久虛電路：永久虛電路：pvc ppermanent virtual circui l交換虛電路：交換虛電路：svc pswitcher virtual circui copyright 2008 huawei technologies co., ltd. all rights reserved.

17、 page 25 atm基本概念（二） l虛電路鏈接:vcc pvirtual circui connection l虛路徑鏈接虛路徑鏈接:vpc pvirtual path connection l凈荷類型標識：凈荷類型標識：pt1 ppayload type ldentifier l信元丟失優(yōu)先級信元丟失優(yōu)先級:clp pcell loss priority copyright 2008 huawei technologies co., ltd. all rights reserved. page 26 pwe3pwe3基本業(yè)務(wù)流程基本業(yè)務(wù)流程 lpwe3:pseudo-wire emul

18、ation edge to edge atm network pe2 atm service ce1 ce2 forward forward atm service ip/mpls p tunnel label pw label control word atm service outer mpls label inner mpls label atm network l注意 pmpls tunnel有外層mpls標簽標識 ppw由內(nèi)層mpls標簽標識 copyright 2008 huawei technologies co., ltd. all rights reserved. page

19、27 atm仿真模式 封裝模式透徹模式aal類型連接類 型 封裝方式 n-to-1 vcccell所有aalsvc包括vpinci,vpinci交 換，cw可選 1-to-1 vcccell所有aalsvc不包括vpinci,vpinci 交換，cw必選 n-to-1 vpccell所有aalsvc包括vpinci,cw可選 1-to-1 vpccell所有aalsvc只包括vpinci,cw必 選 copyright 2008 huawei technologies co., ltd. all rights reserved. page 28 atm n-to-1 cell mode lat

20、m n-to-1 cell mode psn transport header (outer mpls label) pw header (inner mpls label) 0000flagreslengthsequence number vpivciptic atm payload (48 bytes) . vpivciptic atm payload (48 bytes) . copyright 2008 huawei technologies co., ltd. all rights reserved. page 29 n-to-1 vcc atm cell transportn-to

21、-1 vcc atm cell transport atm network ce pe ip/mpls atm network atm network atm network atm network atm network pe ce ce ce ce ce pvc:vpi 3/vci 3 pvc:vpi 3/vci 3 pvc:vpi 1/vci 1 pvc:vpi 1/vci 1 pvc:vpi 2 /vci 2 pvc:vpi 2 /vci 2 copyright 2008 huawei technologies co., ltd. all rights reserved. page 3

22、0 n-to-1 vcc atm cell transportn-to-1 vcc atm cell transport atm network ce pe atm network atm network atm network atm network atm network ce ce ce ce ce pvc:vpi 3/vci 3 pvc:vpi 3/vci 3 pvc:vpi 1/vci 1 pvc:vpi 1/vci 1 pvc:vpi 2/vci 2 pvc:vpi 2/vci 2 copyright 2008 huawei technologies co., ltd. all r

23、ights reserved. page 31 n-to-1 vpc atm cell transportn-to-1 vpc atm cell transport atm network ce pe ip/mpls atm network atm network atm network atm network atm network pe ce ce ce ce ce pvc:vpi 3/vci 3 pvc:vpi 3/vci 3 pvp:vpi 1/vci 1 pvp:vpi 1/vci 1 pvp:vpi 2 /vci 2 pvp:vpi 2 /vci 2 copyright 2008

24、huawei technologies co., ltd. all rights reserved. page 32 n-to-1 vpc atm cell transportn-to-1 vpc atm cell transport atm network ce pe atm network atm network atm network atm network atm network ce ce ce ce ce pvp:vpi 3 pvp:vpi 1 pvp:vpi 1 pvc:vpi 2 pvp:vpi 2 pvp:vpi 3 copyright 2008 huawei technol

25、ogies co., ltd. all rights reserved. page 33 atm network atm network 1 to 1 atm vcc cell transport1 to 1 atm vcc cell transport lremote 1-to-1 vcc atm cell transport pe2 ce1 ce2 pvc:vpi 1/vci/1 forward pvc:vpi 2/vci/2p atm network ce1 atm network pe pvc:vpi 1/vci/1 pvc:vpi 2/vci/2 llocal 1-to-1 vcc

26、atm cell transport pe1 copyright 2008 huawei technologies co., ltd. all rights reserved. page 34 atm network atm network 1 to 1 vpc atm cell transport1 to 1 vpc atm cell transport lremote 1-to-1 vpc atm cell transport pe2 ce1 ce2 pvp:vpi 1 forward pvp:vpi 2 p atm network ce1 atm network pe pvp:vpi 1

27、pvp:vpi 1 llocal 1-to-1 vpc atm cell transport ce2 copyright 2008 huawei technologies co., ltd. all rights reserved. page 35 vpi/vci映射 atm switch1 atm switch atm switch2 atm switch1 ip/mpls atm switch1 vpi:vci=1/100 vpi:vci=2/200 pe2 pe1 vpi:vci=1/100vpi:vci=2/200 copyright 2008 huawei technologies

28、co., ltd. all rights reserved. page 36 問 題 l請列出vcc和vcp的不同點 l請列出1to1和nto1兩種映射方式的不同點 copyright 2008 huawei technologies co., ltd. all rights reserved. page 37 目 錄 l1. pwe3概述 l2. tdm業(yè)務(wù)仿真 l3. atm業(yè)務(wù)仿真 l4. ehrenet業(yè)務(wù)仿真業(yè)務(wù)仿真 l5. pwe3的典型應(yīng)用 copyright 2008 huawei technologies co., ltd. all rights reserved. page

29、 38 ethernetethernet業(yè)務(wù)仿真流程業(yè)務(wù)仿真流程 lpwe3:pseudo-wire emulation edge to edge ethernetn etwork pe2 atm service ce1 ce2 forward forward atm service ip/mpls p tunnel label pw label control word atm service outer mpls label inner mpls label ethernetn etwork copyright 2008 huawei technologies co., ltd. all

30、rights reserved. page 39 ethernet業(yè)務(wù)類型 l以太網(wǎng)專線業(yè)務(wù)（e-line service） p點到點服務(wù) l以太網(wǎng)專網(wǎng)服務(wù)（e-lan service） p多點到多點業(yè)務(wù) l以太網(wǎng)匯聚業(yè)務(wù)（e-aggr service） p多點到點匯聚業(yè)務(wù) copyright 2008 huawei technologies co., ltd. all rights reserved. page 40 以太專線業(yè)務(wù)以太專線業(yè)務(wù) pe2 pe1 ip/mpls tunnel label pw header(label=b b company(vid=5) company a c

31、ompany b a company(vid=5)a company(vid=5)a company(vid=5) b company(vid=5) company a company b a company(vid=5) b company(vid=5) tunnel label pw header(label=b b company(vid=5) copyright 2008 huawei technologies co., ltd. all rights reserved. page 41 以太專網(wǎng)業(yè)務(wù)以太專網(wǎng)業(yè)務(wù) pe2 pe1 ip/mpls site 3 site 1 site 3

32、 port1 port1 port1 pe3 pw1 mac address table for pe1: dmac vla out port mac1-1 2port1 mac1-2 3port1 mac2-1 2pw1 mac2-2 2pw1 mac3-1 2pw2 mac3-2 3pw2 mac address table for pe1: dmac vla out port mac1-1 2port1 mac1-2 3port1 mac2-1 2pw1 mac2-2 2pw1 mac3-1 2pw3 mac3-2 3pw3 mac address table for pe1: dmac

33、 vla out port mac1-1 2pw2 mac1-2 3pw2 mac2-1 2port3 mac2-2 2port3 mac3-1 2port1 mac3-2 3port1 vlan2:mac 3-1 vlan3:mac 3-2 vlan2:mac 1-1 vlan3:mac 1-2 vlan2:mac 2-1 vlan3:mac 2-2 copyright 2008 huawei technologies co., ltd. all rights reserved. page 42 以太匯聚業(yè)務(wù) nodeb 1 nodeb 2 nodeb 3 nodeb 4 ne2 ne1 n

34、e3 rnc fe1 fe2 fe1 fe2 ge1 port1 port2 port1 port2 vlan forwadring table for ne1 and ne2 parameter ne1 ne2 source port type v-uni v-uni v-uni v-uni source port fe1 fe2 fe1 fe2 source vlan 100 100 100 100 sink port type v-nni v-nni v-nni v-nni sink port port1 port1 port1 port1 sink vlan 1 2 3 4 vlan forwadring table for ne1 and ne2 parameter ne1 ne2 source port type v-uni v-uni v-uni v-uni source port port1 port1