MPLS FOR MISSION-CRITICAL MICROWAVE NETWORKS BUILDING A HIGHLY RESILIENT MICROWAVE NETWORK WITH MULTI-RING TOPOLOGY

Transcription

1 MPLS FOR MISSION-CRITICAL MICROWAVE NETWORKS BUILDING A HIGHLY RESILIENT MICROWAVE NETWORK WITH MULTI-RING TOPOLOGY TECHNICAL WHITE PAPER H rslny n srv vllty r ky sn onsrtons wn uln msson-rtl mrowv ntworks. T trtonl rttur o rn-n-spok topoloy n prov stron protton nst lur n t rn sts ut lvs t spoks n ss sts vulnrl to upstrm lur us tr s no pt vrsty protton. Ts wt ppr susss ow ployn mult-rn topoloy n ss sts n prov t protton rqur n xplns wy only Lyr 3 mrowv tnoloy n us to lvr t ull pt vrsty.

2 TABLE OF CONTENTS Introuton / 1 Sortomns o rn-n-spok topoloy / 1 Mrtn rom rn-n-spok to mult-rn topoloy / 2 Mult-rn ploymnt wt Lyr 2 mrowv pltorm / 3 Opton 1: STP / 3 Opton 2: ERPS / 3 Mult-rn ploymnt wt Lyr mrowv pltorm / 5 T Altl-Lunt Lyr 3 mrowv soluton / 7 Conluson / 8 Aronyms / 8 Rrns / 8

3 INTRODUCTION Dploymnt o mrowv lnks n msson-rtl ntworks wll ontnu, prtulrly n snros wr wrln ltrntvs su s r lnk r not sl or woul too ostly to ploy. Mrowv s lso n ttrtv tnoloy to prov kup pt or r lnk n som ss, prtulrly n t ntwork or. As sown n Fur 1, typl mrowv ntwork topoloy s s on n rton rn wt spoks to t most stnt sts. Fur 1. A typl rn-n-spok mrowv topoloy Arton rn As sown n Fur 2, typl mrowv pltorm typlly onssts o An noor unt (IDU), w lso untons s n Etrnt swt supportn vn Etrnt turs, nlun ITU-T G Etrnt rn protton swtn n rnt vrnts o Spnnn Tr Protool (STP) On or mor mrowv ros Fur 2. A typl Lyr 2 mrowv pltorm SHORTCOMINGS OF RING-AND-SPOKE TOPOLOGY In typl rn-n-spok rttur, rton rn nos v rslny us SONET/SDH-lk rn protton mnsm s n stnrz n s vll n rrr-r t ommuntons trou Lyr 3 IP/MPLS st r-rout Ll Swt Pt (LSP) protton [2] or Lyr 2 Etrnt ITU-T G.8032 Etrnt rn protton. 1 ITU-T G.8032, Etrnt Rn Protton Swtn, Frury 2012 n Amnmnt July ttp:// MPLS or Msson-Crtl Mrowv Ntworks 1

4 Howvr, t spok sts n Fur 1 (,,,, n ) r vulnrl to upstrm spok st lurs. For xmpl, srv vllty t No s sujt to pt ss to No n No. I ny lur ours lon t pt --, srv t No woul own u to lk o pt vrsty. T worst s s wn No ls: srv t No n No lso l. For ommrl rrrs, non-sl-rovrl lurs mt ptl t t rmot spok sts us srv mpt t r-lun sts mt mnml. Howvr, n msson-rtl stors su s pul sty or utlts, t s otn qully mportnt, n lso mnt y ovrnmnt rultons, to xtn smlr lvl o ntwork protton to spok sts. How n srv vllty mprov or spok sts? MIGRATING FROM RING-AND-SPOKE TO MULTI-RING TOPOLOGY Srv vllty or spok sts n mprov y usn mult-rn topoloy,, n w sutnn spok n sts (, n n Fur 3) r ntronnt to orm two ss rns (Ass Rn 1 n Ass Rn 2), w r jon totr wt n rton rn. I tr s lr stn twn sutnn spok n sts ( n n Fur 3), n ntrmt rly st mt n to ommsson twn tm. Fur 3. A mult-rn topoloy Ass rn 1 Arton rn Ass rn 2 Dployn mult-rn topoloy provs mult-pt vrsty n mprovs t vllty or ll spok sts. For xmpl, No n No now v ltrnt pts to t rton rn trou --. Evn oul ult ours (or xmpl, ot No n No l), tr pt s stll vll or No n No trou ---. Ts lvl o protton s vtl to nsur tt rtl oprtons ontnu to srv t nrl pul. MPLS or Msson-Crtl Mrowv Ntworks 2

5 Ts sm mult-pt vrsty protton n lso ppl to n rton rn y o-jonn rton rns s sown n Fur 4. Fur 4. Mult-rton rn provn mult-pt vrsty protton Ass rn 1 Arton rn 1 Ass rn 2 Arton rn 2 MULTI-RING DEPLOYMENT WITH A LAYER 2 MICROWAVE PLATFORM Tr r two mjor Lyr 2 optons to mplmnt mult-rn ntwork: Spnnn Tr Protool orn to IEEE Rommnton 802.ID Etrnt Rn Protton Swtn (ERPS) orn to ITU-T Rommnton G.8032 Opton 1: STP STP ws ornlly stnrz n IEEE 802.1D s loop prvnton n ntwork rovry mnsm [1]. Bus t ws sn mnly or ntrprs ppltons, rovry sp ws not optmz n oul rn rom sons to tns o sons, pnn on ntwork sz n topoloy. To mprov rovry prormn, nw vrnts su s Rp Spnnn Tr Protool (RSTP) 2 wr stnrz tt mprov prormn to t orr o sons pnn on ntwork topoloy. Howvr, RSTP stll lls sort o trtonl SONET/SDH-s ntwork rovry sp, w s t nmrk or msson-rtl ntwork tnoloy onsrtons n s stll ntwork sz- n topoloy-pnnt. Tror, STP n RSTP r not ttrtv tnl optons. Opton 2: ERPS In n ort to mk Etrnt ntworks s rslnt s SONET/SDH-ntworks, prtulrly n rn topoloy, t ITU-T vlop ERPS Rommnton G.8032 to llow n Etrnt rn to rovr n 50 ms. 2 RSTP ws rst stnrz n 802.1w n ltr norport nto nwr ton o 802.1D ttp:// MPLS or Msson-Crtl Mrowv Ntworks 3

6 In nrl, ERPS works wll t provn protton rom snl lur n rn. As sown n Fur 5, No normlly uss pt -- to r t rton rn. Fur 5. Mult-rn ploymnt wt norml tr low snro Prmry pt Etrnt rn 1 Bkup pt 7705 SAR I - ls, Etrnt rn protton r-rts tr to pt ---- (s Fur 6), w oms t tv pt. Fur 6. Tr lows lon kup pt Etrnt rn 1 Bkup pt Etrnt rn 2 Howvr, notr lur ours lon t ltrnt pt -- (s Fur 7), t Etrnt rn wll no lonr l to rovr us G.8032 only works wt snl rn. Fur 7. No Etrnt ommunton spt vll ommunton pt No pt vll MPLS or Msson-Crtl Mrowv Ntworks 4

7 To ovrom ts sortomn, ITU-T stnrz t son vrson o G.8032, ommonly known s G.8032v2, n t support o mult-rn protton. Howvr, ts plty s not ommonly vll n t Lyr 2 mrowv pltorms sr rlr n ts ppr. Tror, wn vllty s rqur n mult-pt vrsty s vll, Lyr 2 Etrnt-s mrowv pltorm s not vl soluton us t nnot mk us o t vrsty to prott tr. MULTI-RING DEPLOYMENT WITH A LAYER MICROWAVE PLATFORM As sown n Fur 8, Lyr 3 mrowv pltorm s: An IDU tt s ull-l IP/MPLS routr On or mor mrowv ros Vrstl support o optl r ntr or Gt Etrnt (GE) n 10 GE Lyr 3 IP/MPLS protton xls n snl-rn snro, mult-rn snro n wt prtl/ull ms topoloy u to t nrnt MPLS ntlln wt ull routn normton o t ntwork. In Fur 8, t prmry LSP s --. Fur 8. Tr lows lon prmry LSP Prmry LSP I ult ours t pt -, t MPLS routr t No sunts ll tr to t pr-stls Fst Rrout (FRR) tunnl -----) (s Fur 9) to kp t ppltons rom n ntrrupt. In t mntm, No n No oul tr tryn to r-stls t prmry LSP trou notr pt or just swt tr to sonry LSP, pnn on tr LSP rovry opton osn. Howvr, t s mportnt to mpsz tt t ppltons r lwys prott y FRR. 3 T FRR tunnl s typlly utomtlly stls y t ntwork nos. T pt o t FRR tunnl s lult s on tr nnrn ts normton prov y t routn protool. MPLS or Msson-Crtl Mrowv Ntworks 5

8 Fur 9. MPLS rovrs tr y r-rtn t to t rst sonry pt Fst r-rout tunnl I notr ult ours lon pt -, s sown n Fur 10, notr sonry pt (----) s lso vll. Fur 10. MPLS rovrs tr n oul-ult stuton Son sonry LSP pt In t utur, t ntwork oprtor wnts to vn mor ntwork rslny (or xmpl, urtr protton or No ), t n lnk twn No n No, s sown n Fur 11; ts ns t topoloy to prtlly-ms on tt n nl y Lyr 3 IP/MPLS sly. Fur 11. Expnn mult-rn topoloy to prtlly-ms topoloy MPLS or Msson-Crtl Mrowv Ntworks 6

9 Lyr 3 IP/MPLS n tk vnt o ny pt vrsty vll wtout ny lmttons n s lso ry or ny utur topoloy n to mprov ntwork rslny. Ts plts r t rsult o t ull ntwork topoloy knowl possss y MPLS routrs trou IP routn. THE ALCATEL-LUCENT LAYER 3 MICROWAVE SOLUTION In trtonl rttur, IP/MPLS s ovrl on t mrowv trnsmsson s two typs o pltorm, on or t r IP/MPLS lyr n t otr or t mrowv trnsmsson lyr (s Fur 12). Ts rqurs t ntwork to ult on two npnnt lyrs n mn y two ntwork mnmnt pltorms, nrsn t omplxty or ntwork oprtors. T nnovtv Altl-Lunt Lyr 3 mrowv soluton (s Fur 12) nls smlss ploymnt o IP/MPLS ovr mrowv ntworks y ntrtn t Altl-Lunt 7705 Srv Arton Routr (SAR) n t Altl-Lunt 9500 Mrowv Pkt Ro (MPR-). On 7705 SAR norports t untons o t IDU t n trtonl rttur. On ntwork mnmnt pltorm, t Altl-Lunt Srv Awr Mnr (SAM) rpls t two ntwork mnmnt pltorms n trtonl rttur. Fur 12. Intrt Altl-Lunt Lyr 3 mrowv trnsport Trtonl rttur Altl-Lunt rttur 5620 SAM IDU # MPR- Routr IDU # SAR Intrtn mrowv nto 7705 SAR mks l sy T ky vnts o t Altl-Lunt soluton r: Elmnton o ul ntwork mnrs us t 7705 SAR n 9500 MPR- r untonn s snl ntwork lmnt mn y on ntwork mnr, t 5620 Srv Awr Mnr Convrn o multpl IDUs n n IP/MPLS routr on on pltorm On mnmnt IP rss, on ntwork lmnt sotwr m n on mntnn upr prour Rp rt tton o mrowv lnk lurs, nlun t rror rt 1+1 ot stny support wt tlss ro protton swtn (RPS) In-sss rt powr to t 9500 MPR- Lss qupmnt n rk sp, sr mnmnt lowr CAPEX n OPEX MPLS or Msson-Crtl Mrowv Ntworks 7

10 CONCLUSION Bus ntwork outs n msson-rtl ntworks n v mmns onom, surty n vn ll onsquns, srv vllty oms vr mor mportnt n ntwork topoloy sn. Trtonl rn-n-spok topoloy, wt ts lmt pt vrsty, os not stsy srv vllty rqurmnts n ll ss, n mny oprtors o msson-rtl ntworks v stron ntrst n movn towr mor rslnt mult-rn topoloy. Howvr, Lyr 2-s mrowv pltorms vll n t nrl mrkt o not yt v t plty to support mult-rn topoloy. T Altl-Lunt Lyr 3 mrowv soluton omns t ull-l IP/MPLS plts o t 7705 SAR wt t ln prormn o t 9500 MRR- n t ntwork mnmnt plts o t 5620 SAM. Ts soluton mpowrs oprtors o msson-rtl ntworks wt vrtully unlmt optons n ntwork topoloy sn s ntworks ontnu to row n xpn. ACRONYMS ERPS IEEE IETF IP ITU LSP MPR MPLS RPS SDH SONET STP RSTP Etrnt Rn Protton Swtn Insttut o Eltrl n Eltrons Ennrs Intrnt Ennrn Tsk For Intrnt Protool Intrntonl Tlommunton Unon Ll Swt Pt Mrowv Pkt Ro Multprotool Ll Swtn Ro Protton Swtn Synronous Dtl Hrry Synronous Optl Ntwork Spnnn Tr Protool Rp Spnnn Tr Protool REFERENCES 1. IEEE D IEEE Stnr or Lol n Mtropoltn Ar Ntworks: M Ass Control (MAC) Brs. ttps://stnrs..or/nsts/stnr/802.1d-1990.tml 2. IETF. Fst R-rout Extnsons to RSVP-TE or LSP Tunnls, My ttp:// 3. ITU-T G.8032, Etrnt Rn Protton Swtn, Frury 2012 n Amnmnt July ttp:// Altl, Lunt, Altl-Lunt n t Altl-Lunt loo r trmrks o Altl-Lunt. All otr trmrks r t proprty o tr rsptv ownrs. T normton prsnt s sujt to n wtout not. Altl-Lunt ssums no rsponslty or nurs ontn rn. Copyrt 2014 Altl-Lunt. All rts rsrv. NP EN (Mr)