2-10To do… Use the command… RemarksEnable OSPF to importroutes of other protocolsimport-route protocol [ process-id |allow-ibgp ] [ cost cost | type type |tag tag | route-policyroute-policy-name ] *RequiredBy default, OSPF does notimport the routes of otherprotocols.Apply a filter policy forimported routesfilter-policy { acl-number | ip-prefixip-prefix-name } export [ protocol[ process-id ] ]OptionalBy default, no filter policy isapplied.Configure the defaultvalues of the routeattributes (including cost,limit, tag, and type) for theroutes importeddefault { cost cost | limit limit | tagtag | type type } *OptionalThe default route attributes areas follows: the cost value is 1,the upper limit on the maximumnumber of imported externalroutes is 1,000, the tag value is1, and the type is type2.Configure to Use IS-IS between a MCE and a PEWhen configuring to use IS-IS between a MCE and a PE, you need to configure the IS-IS processes tobe bound to VPN instances and manually import the VPN routes in the site maintained by the MCEdevice to the routing table of the PE.In IS-IS, routes discovered by other routing protocols are external routes. While importing routes ofother protocols, you can specify the default cost value for the imported routes as well. You can alsoapply filter policies for imported routes.Follow these steps to configure IS-IS to import external routes:To do… Use the command… RemarksEnter system view system-view —Enable IS-IS for a VPNinstance and enter IS-ISviewisis [ process-id ] [ vpn-instancevpn-instance-name ] —Import routes of otherprotocolsimport-route { isis [ process-id ] |ospf [ process-id ] | rip [ process-id ]| bgp [ allow-ibgp ] | direct | static }[ cost cost | cost-type { external |internal } | [ level-1 | level-1-2 |level-2 ] | route-policyroute-policy-name | tag tag ] *RequiredBy default, IS-IS does notimport routes of otherprotocols.If none of the level-1, level-2,and level-3 keywords isspecified, the external routesare imported to level-2 routingtable.Apply a filter policy forimported routesfilter-policy { acl-number | ip-prefixip-prefix-name | route-policyroute-policy-name } export [ isisprocess-id | ospf process-id | ripprocess-id | bgp | direct | static ]OptionalBy default, no filter policy isapplied.
