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OSPF network. Route 192.168.18.1:0.0.0.3 actually represents a route to the<br />

pseudonode corresponding to the fe-1/0/0 link. (In OSPFv3, a LAN link is called a<br />

transit link.) Any multiaccess link, such as a LAN or an NBMA link, is represented<br />

by a fake node, or pseudonode, in the IGP. This route is used for debugging and is<br />

not installed in the forwarding table.<br />

The OSPFv3 link-state database contains more information than for OSPFv2:<br />

aviva@RouterH> show ospf3 database<br />

OSPF3 link state database, area 0.0.0.0<br />

Type ID Adv Rtr Seq Age Cksum Len<br />

Router 0.0.0.0 10.0.0.1 0x80000422 933 0x3338 40<br />

Router *0.0.0.0 192.168.18.1 0x80000013 327 0x1fee 40<br />

Router 0.0.0.0 192.168.19.1 0x80000012 3399 0x98e4 56<br />

Network *0.0.0.3 192.168.18.1 0x80000003 27 0x31ee 32<br />

Network 0.0.0.1 192.168.19.1 0x8000000e 3399 0x4352 36<br />

IntraArPfx *0.0.0.4 192.168.18.1 0x80000002 932 0x2602 44<br />

IntraArPfx 0.0.0.2 192.168.19.1 0x8000000d 3399 0xe937 44<br />

OSPF3 Link-Local link state database, interface fe-1/0/0.0<br />

Type ID Adv Rtr Seq Age Cksum Len<br />

Link 0.0.0.4 10.0.0.1 0x80000001 933 0xd6af 56<br />

Link *0.0.0.3 192.168.18.1 0x80000005 627 0x3f76 56<br />

In addition to listing the entries in this area, Area 0.0.0.0, the second part of the output<br />

shows the entries in the link-local, link-state database for this interface. These are<br />

the database entries learned over the specific OSPFv3 interface and they are visible<br />

only by nodes that are directly on this link.<br />

See Also<br />

Recipes 7.6 and 12.1<br />

12.5 Configuring a Multiarea OSPF Network<br />

Problem<br />

Your OSPF network has a number of physical and departmental boundaries, and, for<br />

administrative purposes and for scalability, you want to divide the network into a<br />

number of areas.<br />

Solution<br />

Configure a second OSPF area on the router:<br />

[edit protocols]<br />

aviva@RouterG# set ospf area 0.0.0.1 interface fe-1/0/0.0<br />

Configuring a Multiarea OSPF Network | 393<br />

This is the Title of the Book, eMatter Edition<br />

Copyright © 2008 O’Reilly & Associates, Inc. All rights reserved.

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