All Rights Reserved. Copyright(c)1997 Internet Initiative Japan Inc. 1

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しょうじこいまる
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5 ISP IX Internet exchange) ISP FDDI ATM ISP Network Access Point (NAP) Metropolitan Area Exchange (MAE) LINX, NSPIXP,JPIX, MEX,HKIX, etc. All Rights Reserved. Copyright(c)1997 Internet Initiative Japan Inc. 5

18 TCP 179 (peer) 1 1 RIP Incremental 16 AS ( IIJ AS2497) Path Vector Path Attribute) AS Path Origin Next Hop Multi-Exit- Discriminator(MED) Local Preference etc. All Rights Reserved. Copyright(c)1997 Internet Initiative Japan Inc. 18

26 AS1 R /16 R3 prefix /16 Next hop AS2 R2 EBGP R2 prefix /16 Next hop R4 prefix /16 Next hop AS R4 EBGP R3 IBGP AS IP IBGP R3 R1 IGP All Rights Reserved. Copyright(c)1997 Internet Initiative Japan Inc. 26

35 0x x0000FFFF 0xFFFF0000-0xFFFFFFFF Well-Known Community NO_EXPORT(0xFFFFFF01) AS NO_ADVERTISE(0xFFFFF02) NO_EXPORT_SUBCONFED(0xFFFFFF03) AS All Rights Reserved. Copyright(c)1997 Internet Initiative Japan Inc. 35

56 1 interface loopback 0 ip address router bgp 1 no synchronization neighbor remote-as 1 neighbor update-source loopback0 neighbor remote-as 2 neighbor route-map MED-OUT out route-map MED-OUT permit 10 match as-path 10 set metric 100 ip as-path access-list 10 permit ^$ 2 interface loopback 0 ip address router bgp 1 no synchronization neighbor remote-as 1 neighbor update-source loopback0 neighbor remote-as 2 neighbor route-map MED-OUT out route-map MED-OUT permit 10 match as-path 10 set metric 200 ip as-path access-list 10 permit ^$ All Rights Reserved. Copyright(c)1997 Internet Initiative Japan Inc. 56

57 AS / /32 AS /32 AS / /16 Atomic_Aggregate, Aggregator={3, } AS PATH= PATH= 3 {1, 2} /32 interface loopback 0 ip address router bgp 3 no synchronization network aggregate-address as-set summary-only neighbor remote-as 3 neighbor update-source loopback0 neighbor remote-as 3 neighbor update-source loopback0 neighbor X.X.X.X remote-as XX All Rights Reserved. Copyright(c)1997 Internet Initiative Japan Inc. 57

58 1 AS2 2 1 AS4 AS /16 1 AS3 AS5 router bgp 5 neighbor remote-as 3 neighbor fromas3 in ip as-path access-list 10 permit ^3 1$ route-map fromas3 permit 10 match as-path 10 set local-preference / / AS AS1 AS4 cisco local-preference 100 All Rights Reserved. Copyright(c)1997 Internet Initiative Japan Inc. 58

59 1 AS2 2 1 AS /30 AS / / AS AS5 AS1 router bgp 1 network mask neighbor remote-as 2 neighbor remote-as 3 neighbor route-map PREPEND out route-map PREPEND permit 10 set as-path prepend 1 1 All Rights Reserved. Copyright(c)1997 Internet Initiative Japan Inc. 59

60 local_pref=100 AS4 IBGP local_pref=90 EBGP EBGP AS /30 AS /30 EBGP AS1 AS1 EBGP /16 ip bgp new-format access-list router bgp 1 neighbor remote-as 2 neighbor send-community neighbor route-map toas2 out neighbor remote-as 3 neighbor send-community neighbor route-map toas3 out route-map toas2 permit 10 match ip address 10 set community 4:100 route-map toas3 permit 10 match ip address 10 set community 4:90 All Rights Reserved. Copyright(c)1997 Internet Initiative Japan Inc. 60

橡C14.PDF

橡C14.PDF BGP4 (( ) InternetWeek 98 ( ) Internet Week98 1998 Toshiya Asaba, Japan Network Information Center 1. 2. BGP 2.1. 2.2. ISP 2.3. IX - 2.4. 2.5. 3. BGP4 3.1. BGP4 3.2. EBGP IBGP 3.3. BGP AS 3.4. AS AS 3.5.