2-5To do… Use the command… RemarksEnter system view system-view —Enable OSPF for aVPN instance (thisoperation also leadsyou to OSPF view)ospf [ process-id |router-id router-id |vpn-instancevpn-instance-name ] *RequiredThis operation is performed on the MCEdevice. As for the correspondingconfiguration on the site, you can justenable OSPF as usual.Enablemulti-VPN-instance CEfor the OSPF processvpn-instance-capabilitysimpleRequiredDisabled by defaultRedistribute routesfrom the remote siteadvertised by the PEimport-route protocol[ process-id | allow-ibgp ][ cost cost | type type | tagtag | route-policyroute-policy-name ] *RequiredNot redistributed by defaultConfigure the OSPFdomain IDdomain-id domain-id[ secondary ]OptionalBy default, the OSPF domain ID is 0.This operation is performed on the MCEdevice. As for the correspondingconfiguration on the site, you can justenable OSPF as usual.Configure the typecodes of OSPFextended communityattributesext-community-type{ domain-id type-code1 |router-id type-code2 |route-type type-code3 }OptionalThe defaults are as follows:0x0005 for Domain ID,0x0107 for Router ID, and0x0306 for Route Type.z Router IDs of the public network configured in system view do not applies to OSPF processesbound to VPN instances. So you need to configure the Router ID after enabling OSPF for a VPNinstance.z To make sure routes can be advertised properly, you need to configure the same domain ID for allthe OSPF processes bound to a VPN.z After enabling OSPF for a VPN instance, you need also to configure to use OSPF for routinginformation exchange, which is described in the IP Routing Volume.Configuring to Use IS-IS between a MCE and a SiteAn IS-IS process can be bound to only one VPN instance. IS-IS processes not bound to any VPNinstances belong to the public network.Follow these steps to configure IS-IS between a MCE and a site:
