Para alterar a Distância em todas as rotas OSPF:

• To change the Distance on just one OSPF route:
• To discard an incoming Prefix:
• To add a Comment to an OSPF route:
• To discard OSPF routes based on the CIDR Length (greater than or equal to /31):
• To change the OSPF Type-1 metric for a route:
• To change from the default of a Type1 route to a Type2 route and change the metric:
  /routing filter rule
  add chain=OSPF_In disabled=no rule=”if ( protocol ospf ) { set distance 50; accept }”
  add chain=OSPF_In disabled=no rule=”if ( dst==172.16.1.3/32 ) { set distance 40; accept }”
  add chain=OSPF_In disabled=no rule=”if ( dst==172.16.1.3/32 ) { reject }”
  add chain=OSPF_In disabled=no rule=”if ( dst==172.16.1.3/32 ) { set comment To_Main_Tower }”
  add chain=OSPF_In disabled=no rule=”if ( dst-len >=31 ) { reject }”
  add chain=OSPF_Out disabled=no rule=”if ( dst==0.0.0.0/0 ) { set ospf-ext-metric 20 }”
  add chain=OSPF_Out disabled=no rule=”if ( dst==0.0.0.0/0 ) { set ospf-ext-type type2; set ospf-extmetric 25 }”
  
  Filtros comumente usados para RIP
• To change the Distance on all RIP routes:
• To change the Distance on just one RIP route:
• To discard an incoming Prefix:
• To add a Comment to a RIP route:
• To discard RIP routes based on the CIDR Length (greater than or equal to /31):
  Commonly Used Filters for BGP
• To change the Distance on all BGP routes:
• To change the Distance on just one BGP route:
• To change the Scope & Target Scope of an incoming route:
• To discard an incoming Prefix:
• To add a Comment to a BGP route:
  /routing filter rule
  add chain=RIP_In disabled=no rule=”if ( protocol rip ) { set distance 30; accept }”
  add chain=RIP_In disabled=no rule=”if ( dst==172.16.1.3/32 ) { set distance 40; accept }”
  add chain=RIP_In disabled=no rule=”if ( dst==172.16.1.3/32 ) { reject }”
  add chain=RIP_In disabled=no rule=”if ( dst==172.16.1.3/32 ) { set comment To_Main_Tower }”
  add chain=RIP_In disabled=no rule=”if ( dst-len >=31 ) { reject }”
  /routing filter rule
  add chain=BGP_In disabled=no rule=”if ( protocol BGP ) { set distance 10; accept }”
  add chain=BGP_In disabled=no rule=”if ( dst==172.16.1.3/32 ) { set distance 40; accept }”
  add chain=BGP_In disabled=no rule=”if ( dst==172.16.1.3/32 ) { reject }”
  add chain=BGP_In disabled=no rule=”if ( dst==172.16.1.3/32 ) { set comment To_Main_Tower }”
  add chain=BGP_In disabled=no rule=”if ( dst==123.123.123.0/24 ) { set scope 50; set scope-target
  35; accept }”
  
  Filtros comumente usados para BGP
• To discard BGP routes based on the CIDR Length (greater than or equal to /24):
• To set the BGP Weight:
• To set the Local Preference:
• To set the Path Prepend:
• To change the Prepending of an incoming route:
• To reject routes that have been Prepended more than 4 times:
• To set the MED on incoming routes:
• To set the MED on outgoing routes:
• To set the IGP Metric:
  add chain=BGP_In disabled=no rule=”if ( dst-len >=24 ) { reject }”
  add chain=BGP_In disabled=no rule=” if ( dst==123.123.123.0/24 ) { set bgp-weight 50; accept }”
  add chain=BGP_In disabled=no rule=” if ( dst==123.123.123.0/24 ) { set bgp-local-pref 200; accept
  }”
  add chain=BGP_Out disabled=no rule=” if ( dst==123.123.123.0/24 ) { set bgp-path-prepend 10;
  accept }”
  add chain=BGP_In disabled=no rule=” if ( dst==123.123.123.0/24 ) { set bgp-path-peer-prepend 1;
  accept }”
  add chain=BGP_In disabled=no rule=” if ( dst==123.123.123.0/24 ) { set bgp-path-peer-prepend >
  4; reject }”
  add chain=BGP_In disabled=no rule=” if ( dst==123.123.123.0/24 ) { set bgp-med 50; accept }”
  add chain=BGP_Out disabled=no rule=” if ( dst==123.123.123.0/24 ) { set bgp-out-med 50; accept
  }”
  add chain=BGP_In disabled=no rule=” if ( dst==123.123.123.0/24 ) { set bgp-igp-metric 10; accept