>Есть Cisco Catalyst 3550. >К нему 2 ethernet канала с ISP1 (15759) и ISP2 (25446). > >Пример 1: >----------------------- >BGP routing table entry for 81.1.229.128/25, version 28937 >Paths: (2 available, best #1, table Default-IP-Routing-Table) >Multipath: eBGP iBGP > Advertised to update-groups: > 4 > 15759 34479 > 83.172.16.38 from 83.172.16.38 (217.18.128.51) > Origin IGP, localpref 100, valid, external, >best > Community: 1032788431 > DMZ-Link Bw 125000 kbytes > 25446 41566 34479 > 213.183.97.33 from 213.183.97.33 (213.183.96.10) > Origin IGP, localpref 100, valid, external > > DMZ-Link Bw 125000 kbytes >----------------------- >Тут все идет через 15759. все понятно. все отлично. > >Пример 2: >----------------------- >BGP routing table entry for 62.68.128.0/19, version 28530 >Paths: (2 available, best #2, table Default-IP-Routing-Table) >Multipath: eBGP iBGP > Advertised to update-groups: > 4 > 25446 34145 > 213.183.97.33 from 213.183.97.33 (213.183.96.10) > Origin IGP, localpref 100, valid, external > > DMZ-Link Bw 125000 kbytes > 15759 34145 > 83.172.16.38 from 83.172.16.38 (217.18.128.51) > Origin IGP, localpref 100, valid, external, >best > Community: 1032788529 > DMZ-Link Bw 125000 kbytes >----------------------- >weight, localpref, metric - все одинаковое. >Как сделать чтобы по умолчанию (если пути одинаковые, с одинаковыми weight, localpref, >metric) все шло на 25446 ? route-map ISP1-in permit 10 <-- на резервного set local-preference 50 ! route-map ISP1-out permit 20 set as-path prepend AS AS AS ! route-map ISP2-in permit 30 <--- на основного set local-preference 150
router bgp AS neighbor x.x.x.x remote-as AS neighbor x.x.x.x description ISP1 neighbor x.x.x.x version 4 neighbor x.x.x.x route-map ISP1-in in neighbor x.x.x.x route-map ISP1-out out neighbor y.y.y.y remote-as AS neighbor y.y.y.y description ISP2 neighbor y.y.y.y version 4 neighbor y.y.y.y route-map ISP2-in in
Попробуйте так
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