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Gestión de filtros en BGP
Hoy os traemos Adrián y yo una conversación sobre la gestión de filtros en BGP. A veces cuando contratáis un tránsito os piden que les digáis los rangos que se van a anunciar, pues mal, eso no es lo más adecuado desde que tenemos los objetos de RIPE AS y AS-SET. En el capítulo de hoy os contamos la diferencia entre access-list, prefix-list y route-map. También os hablamos de bgpq4 que podéis descargar desde https://github.com/bgp/bgpq4. Otra cosa que os comentamos es la direfencia entre AS y AS-SET y luego hablamos de RPKI y cómo automatizar los filtros. Ejemplos: Lista de prefijos: bgpq4 -A -SRADB,RIPE -F ‘%n/%l\n’ -4 AS-TECNOCRATICA<br /> bgpq4 -A -SRADB,RIPE -F ‘%n/%l\n’ -6 AS-TECNOCRATICA Lista de prefijos de sólo un AS: bgpq4 -A -SRADB,RIPE -F ‘%n/%l\n’ -4 as15954<br /> bgpq4 -A -SRADB,RIPE -F ‘%n/%l\n’ -6 as15954 Configuración Cisco: bgpq4 -Al tecnocratica AS-TECNOCRATICA<br /> bgpq4 -Al tecnocratica -6 AS-TECNOCRATICA El ejemplo de un comando de cada sería: $ bgpq4 -A -SRADB,RIPE -F ‘%n/%l\n’ -4 AS-TECNOCRATICA<br /> 2.56.165.0/24<br /> 5.56.160.0/21<br /> 5.181.44.0/22<br /> 23.139.41.0/24<br /> 23.188.240.0/24<br /> 31.24.120.0/21<br /> 31.47.72.0/21<br /> 31.170.100.0/22<br /> 37.247.120.0/21<br /> 38.103.194.0/24<br /> 38.143.153.0/24<br /> 44.9.16.0/21<br /> 44.31.43.0/24<br /> 44.31.80.0/24<br /> 44.31.92.0/22<br /> 44.31.182.0/24<br /> 44.161.204.0/23<br /> 44.161.219.0/24<br /> 44.161.220.0/22<br /> 44.161.230.0/24<br /> 44.161.237.0/24<br /> […] edu@andromeda:~$ bgpq4 -A -SRADB,RIPE -F ‘%n/%l\n’ -4 as15954<br /> 31.24.120.0/21<br /> 31.47.72.0/21<br /> 37.247.120.0/21<br /> 91.199.120.0/24<br /> 91.216.219.0/24<br /> 185.49.184.0/22<br /> 185.57.196.0/22<br /> 185.66.73.0/24<br /> 185.66.74.0/24<br /> 185.203.224.0/22<br /> 194.176.119.0/24<br /> 217.18.32.0/20 edu@andromeda:~$ bgpq4 -Al tecnocratica AS-TECNOCRATICA<br /> no ip prefix-list tecnocratica<br /> ip prefix-list tecnocratica permit 2.56.165.0/24<br /> ip prefix-list tecnocratica permit 5.56.160.0/21 le 22<br /> ip prefix-list tecnocratica permit 5.181.44.0/22<br /> ip prefix-list tecnocratica permit 8.23.229.0/24<br /> ip prefix-list tecnocratica permit 23.132.185.0/24<br /> ip prefix-list tecnocratica permit 23.136.232.0/24<br /> ip prefix-list tecnocratica permit 23.138.216.0/24<br /> ip prefix-list tecnocratica permit 23.139.41.0/24<br /> ip prefix-list tecnocratica permit 23.140.248.0/23 ge 24 le 24<br /> ip prefix-list tecnocratica permit 23.141.88.0/24<br /> ip prefix-list tecnocratica permit 23.188.240.0/24<br /> ip prefix-list tecnocratica permit 31.24.120.0/21<br /> ip prefix-list tecnocratica permit 31.47.72.0/21<br /> ip prefix-list tecnocratica permit 31.170.100.0/22<br /> ip prefix-list tecnocratica permit 37.247.120.0/21<br /> ip prefix-list tecnocratica permit 38.103.194.0/24<br /> ip prefix-list tecnocratica permit 38.134.111.0/24<br /> ip prefix-list tecnocratica permit 38.143.153.0/24<br /> ip prefix-list tecnocratica permit 41.216.177.0/24<br /> ip prefix-list tecnocratica permit 41.216.178.0/24<br /> ip prefix-list tecnocratica permit 41.216.186.0/24<br /> ip prefix-list tecnocratica permit 44.9.16.0/21<br /> ip prefix-list tecnocratica permit 44.31.43.0/24<br /> ip prefix-list tecnocratica permit 44.31.80.0/24<br /> ip prefix-list tecnocratica permit 44.31.92.0/22<br /> ip prefix-list tecnocratica permit 44.31.182.0/24<br /> ip prefix-list tecnocratica permit 44.159.68.0/24<br /> ip prefix-list tecnocratica permit 44.161.204.0/23<br /> ip prefix-list tecnocratica permit 44.161.219.0/24<br /> ip prefix-list tecnocratica permit 44.161.220.0/22<br /> ip prefix-list tecnocratica permit 44.161.230.0/24<br /> ip prefix-list tecno