1. End User MultihomingLoad-balanceLoad-sharing (kae@du.net.tw) 1Agenda http://www.seed.net.tw Leased Line ISDN ADSL FTTX Multihoming 21

2. http://www.seed.net.tw What is end user?ISP(Web/Mail/FTP serverOffice)transitLoad-balance? Load-sharing?networking paperLoad-balancebalance on serverLoad-sharingbalance on circuitLoad-balance L4 switch 3 http://www.seed.net.twISDN IGP-primaryLeased LineDefa ISP ult route End user ISDN ISDNLeased Line ISP X IGP-primaryEnd user ISDNDefault route 4 2 3. http://www.seed.net.tw (cont.) ISDN IGP-primary Leased LineDefISP ault rou teLeased Line End user IGP-primary Leased LineDefaISP ult routeLeased Line Def End user 5ault rout e http://www.seed.net.tw(cont.) IGP-primary Leased LineDefISP ault rou te End userLeasedIGP-primaryLine Default route IGP-primary Default route ISPactiveHSRP/VRRP End userIGP-primary standby 6 3 4. http://www.seed.net.tw (cont.) ISPBGP Multihoming end userIP blockAS100172.20.0.0/20BGP-primary BGP-primary ISP1 AS100 BG BGPP route AS64512 BGP 172.20.0.0/20InternetEnd user BGPute P ro BGISP2 AS200 BGPBGP-primaryAS200 BGP-primary 172.20.0.0/207 http://www.seed.net.tw(cont.) ISPBGP Multihoming end userIP blockAS100 BGP route172.20.0.0/20 BGP-primaryactive BGP-primary ISP1 AS100 BGP BGP Internet BGPEnd userAS64512BGP 172.20.0.0/20 ISP2 AS200BGP BGP-primary BGP-primarystandby AS200 BGP route 172.20.0.0/208 4 5. http://www.seed.net.tw ADSLISDNADSLIGP-primaryLeasedDefLineault ISP rout IGP-backupeEnd user ADSL ADSL Leased ISP IGP-backupXLineEnd user ADSL 9 Default route http://www.seed.net.tw End userADSLFTTX IGP-primary FTTX/ADSL Default ISP rout IGP-backupeEnd user ADSL ADSL/FTTXrouter port downUP/UP IGP-primary FTTX/ADSL Def ISP IGP-backupXault rout e10End user ADSL5 6. http://www.seed.net.tw ADSL/FTTXdynamic routing protocol UP/UP FTTX/ADSLISP IGP-backup XEnd user ADSL Default routeCiscoReliableStatic Routing BackupIPuplink(ex. ping gateway)uplink 11 Multihominghttp://www.seed.net.twMultihomingBGPIP blocksISPBGPBGPIP blocks?MultihomingBGP protocolIP blocksBGP protocolIP blocksBGP protocolIP blocks 12 6 7. http://www.seed.net.tw Multihoming BGP protocolIP blocksAS100IGP-primary 172.20.0.0/20(aggre)172.20.0.0/21ISP1 AS100 172.20.0.0/21BGP-primary172.20.0.0/20End userInternetBGP-primaryAS200 172.20.0.0/20(aggre) ISP2 AS200 172.20.8.0/21 172.20.8.0/21 IGP-primary 13 Multihominghttp://www.seed.net.tw BGP protocolIP blocks IGP-primaryAS100172.20.0.0/20ISP1 AS100 172.20.0.0/16 172.20.0.0/20BGP-primaryEnd userInternetAS64512 BGP-primary 172.20.8.0/21AS200 172.20.0.0/20(aggre) ISP2 AS200 172.20.8.0/21 BGP-primary 14 7 8. http://www.seed.net.tw Multihoming BGP protocolIP blocks IGP-primaryAS100172.20.0.0/20ISP1 AS100 172.20.0.0/16BGP-primary 172.20.0.0/20 End userInternetBGP-primaryAS200 172.20.0.0/20(aggre) ISP2 AS200172.20.8.0/21172.20.8.0/21 IGP-primary 15 http://www.seed.net.tw? 168