2009.07.28Internet-Routing-BGP

BGP July 2009 ShakeSoul, Inc.

• • BGP • • static BGP • BGP • ISP • • • / • • BGP • doc. ver. 1.0 ShakeSoul, Inc.

• ID : d_sea • • • NTT SE : 3.5 • : 3.5 • Y! • : 10 • :2 • 3D “meet-me” • (www.shakesoul.net) 2009.02 • • • 2009.03 JTPA ID: hxmasaki • BPstudy, hbstudy doc. ver. 1.0 ShakeSoul, Inc.

• BGP • doc. ver. 1.0 ShakeSoul, Inc.

: ISP Internet • Router ISP ISP Customer Router • ISP Server doc. ver. 1.0 ShakeSoul, Inc.

Internet • Single Point of Failure Router A Router B • L2 L3 failover Router C Router D • ISP Server Server doc. ver. 1.0 ShakeSoul, Inc.

ISP ISP A ISP B ISP C • 3 • Border Router : ISP Border Router Border Router Border Router • Core Router : • Edge Router : Core Core ISP Router Router • 2 Edge Router • OSPF • 2 Router Customer (ECMP) doc. ver. 1.0 ShakeSoul, Inc.

1 Internet • 1ISP1 ISP A • ISP 1 Router A-1 • 100Mbps, 1Gbps, 10Gbps • trunk default route • 0.0.0.0/0 Router C-1 ISP • ISP Customer doc. ver. 1.0 ShakeSoul, Inc.

2 Internet • ISP 2 : 1ISP n • ISP A • ISP ( ) Router A-1 Router A-2 • ( ) default route • ) OSPF Equal Cost Multi Path Router C-1 0.0.0.0/0 Router C-2 • L2 (xSRP) 1 default route • (SPOF ) 0.0.0.0/0 ECMP(OSPF) • ISP Customer doc. ver. 1.0 ShakeSoul, Inc.

3 Internet • ISP : nISP n • AS ISP BGP peering ISP A ISP B • BGP Router A-1 Router B-1 • BGP BGP • ISP Router C-1 Router C-2 • • BGP Customer • ISP doc. ver. 1.0 ShakeSoul, Inc.

BGP • BGP : Border Gateway Protocol BGP • BGP-4 : RFC1771 AS 1 AS 2 • BGP BGP • ISP BGP • AS preﬁx (IP AS 3 ) BGP BGP nexthop • AS 1 1 BGP (peer) BGP BGP • IPv6 BGP-4+ AS 4 AS 5 • [TODO] AS JPNIC list Internet • http://www.nic.ad.jp/ja/ip/as-numbers.txt doc. ver. 1.0 ShakeSoul, Inc.

BGP • AS iBGP AS preﬁx ( ) metric 80 9370 localpref 100 59.106.0.0/17 Community: 9607:13 Sakura 9607:3249 23816 metric 100 • localpref 200 203.216.224.0/19 Yahoo Community: 9607:11 Japan 9607:3193 9607:23816 • metric 100 38651 localpref 90 110.44.176.0/21 Community: mixi 2516:1010 9607:3249 • nexthop IP IGP(OSPF, RIP ) doc. ver. 1.0 ShakeSoul, Inc.

BGP • trafﬁc • / Local 1 Preference • Local_Preference • AS_Path 2 AS Path path • MED(Multi Exit Discriminator) 3 MED • Community • Router ID 4 Community LP, MED • conﬁg / 5 Router ID • [TODO] Looking Glass • http://lg01.colo01.bbtower.ad.jp doc. ver. 1.0 ShakeSoul, Inc.

BGP conﬁg Router C-1 interface Gi 0/0 ip address 10.255.0.1 255.255.255.252 ISP A 10.2.0.0/16 .... AS 2 router ospf 1 passive-interface Gi0/0 network 10.255.0.0 252.255.255.255 area 0 Router A-1 .... .2 router bgp 1 network 10.1.0.0 mask 255.255.0.0 BGP 10.255.0.0/30 neighbor 10.255.0.2 remote-as 2 neighbor 10.255.0.2 route-map SAMPLE-IN in .1 neighbor 10.255.0.2 route-map SAMPLE-OUT out Router C-1 .... route-map SAMPLE-IN permit 10 set local-preference 200 set community 1:2 AS 1 route-map SAMPLE-IN permit 20 10.1.0.0/16 match as-path 222 Customer route-map SAMPLE-OUT permit 10 set metric 10 ip as-path access-list 222 permit ^(2_)+$ doc. ver. 1.0 ShakeSoul, Inc.

static 1ISP 2 BGP default route BGP Internet 1. 1 peer ( ) 2. (filter deny ISP A ) Router A-1 Router A-2 3. (deny filter ) 4. 1 default route 0.0.0.0/0 Router C-1 Router C-2 5. 2 6. Router C-1/2 default route (BGP default route ) 0.0.0.0/0 ECMP(OSPF) 7. Customer prefix: 10.0.0.0/8 doc. ver. 1.0 ShakeSoul, Inc.

static 1ISP 2 BGP default route BGP Internet 1. 1 peer ( ) 2. (filter deny ISP A ) Router A-1 Router A-2 3. (deny filter ) 4. 1 peering default route 0.0.0.0/0 Router C-1 Router C-2 5. 2 6. Router C-1/2 default route (BGP default route ) 0.0.0.0/0 ECMP(OSPF) 7. Customer prefix: 10.0.0.0/8 doc. ver. 1.0 ShakeSoul, Inc.

static1ISP 2 BGP default route BGP Internet 1. 1 peer ( ) 2. (filter deny ISP A ) Router A-1 Router A-2 3. prefix: Full Route (deny filter ) 4. 1 peering default route prefix: 10.0.0.0/8 0.0.0.0/0 Router C-1 Router C-2 5. 2 6. Router C-1/2 default route (BGP default route ) 0.0.0.0/0 ECMP(OSPF) 7. Customer prefix: 10.0.0.0/8 doc. ver. 1.0 ShakeSoul, Inc.

static1ISP 2 BGP default route BGP Internet 1. 1 peer ( ) 2. (filter deny ISP A ) Router A-1 Router A-2 3. prefix: Full Route prefix: Full Route (deny filter ) peering 4. 1 peering default route prefix: 10.0.0.0/8 prefix: 10.0.0.0/8 0.0.0.0/0 Router C-1 Router C-2 5. 2 6. Router C-1/2 default route (BGP default route ) 0.0.0.0/0 ECMP(OSPF) 7. Customer prefix: 10.0.0.0/8 doc. ver. 1.0 ShakeSoul, Inc.

static1ISP 2 BGP default route BGP Internet 1. 1 peer ( ) 2. (filter deny ISP A ) Router A-1 Router A-2 3. prefix: Full Route prefix: Full Route (deny filter ) peering 4. 1 peering prefix: 10.0.0.0/8 prefix: 10.0.0.0/8 Router C-1 Router C-2 5. 2 6. Router C-1/2 default route (BGP default route ) 0.0.0.0/0 ECMP(OSPF) 7. Customer prefix: 10.0.0.0/8 doc. ver. 1.0 ShakeSoul, Inc.

BGP Internet ISP A ISP B • Full Route ISP 2 • IX peering upstream • L2 1interface Router Router C-1 C-2 • AS private Customer peering Router Router Router C-3 C-4 C-4 • preﬁx public peer IX (Internet eXchange) private peer • • peer ISP 1 .... ISP n ISP C doc. ver. 1.0 ShakeSoul, Inc.

BGP • JPNIC • BGP • AS • BGP • Preﬁx : IP • conﬁg • Full Route • • Cisco 6500 CRS-1, Juniper M10i • SNMP trap syslog / • 2 • BGP Full Route • • 2 doc. ver. 1.0 ShakeSoul, Inc.

BGP / • • • 1ISP • BGP • • BGP ISP • • • / • doc. ver. 1.0 ShakeSoul, Inc.

BGP • • • • 1 interface • 1 ISP • • doc. ver. 1.0 ShakeSoul, Inc.

• BGP • Web BGP BGP • or • • JANOG doc. ver. 1.0 ShakeSoul, Inc.

Thank You!! Q&A Any Question? doc. ver. 1.0 ShakeSoul, Inc.

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2009.07.28Internet-Routing-BGP

by Hiro Fukami on Jul 29, 2009

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2009.07.28Internet-Routing-BGP — Presentation Transcript