3Com Router 3000 Ethernet FamilyConfiguration Guide Chapter 4 OSPF Configuration3Com Corporation4-10z The default process ID 1 will be selected if no one is specified when configuringthe ospf command; process ID 1 is disabled by default if no one is specified whenconfiguring the undo ospf command.z The process ID must be consistent in the same area; otherwise, insulationbetween processes will be resulted.z If multiple OSPF processes run on a router, you are recommended to specifydifferent router IDs for different processes with the router-id command.z Binding an OSPF with a VPN with the vpn-instance command is available inMPLS VPN application. See the VPN part.4.2.3 Entering the OSPF Area ViewOSPF divides an AS into smaller areas and assigns routers to different groups logically.Perform the following configuration in OSPF view.Table 4-3 Enter the OSPF area viewOperation CommandEnter the OSPF area view area area-idDelete a designated OSPF area undo area area-idArea ID can be input in decimal integers or in IP address format, but only output as IPaddress.Take the area as whole in configuring parameters for the OSPF routers in the samearea, otherwise information exchange may fail between adjacent routers, or routinginformation may be blocked or routing loops may be generated.4.2.4 Specifying a Network Segment to Run OSPFAfter enabling OSPF in system view, you must specify on which network segmentOSPF should be applied.Perform the following configuration in OSPF area view.Table 4-4 Specify a network segment to run OSPFOperation CommandSpecify a network segment to run OSPF network ip-address wildcard-maskDisable OSPF on the network segment. undo network ip-addresswildcard-maskYou may assign a router (an ABR) but not a network segment to multiple areas.
