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Cisco 12000/10700 v3.1.1 Router Manager User Guide
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Chapter 14 Routing OSPF Management
AS/Tag—Indicates t he Proc ess I D of the r edistr ibuted pr otoc ol. A Posi tive Integer will in dica te t he
process id of the redistributed protocol; a character string will indicate the ISO routing area tag.
IS-IS Route Level—Specifies the routing level of ISIS Protocol.
Redistribution Metric—Displays the metric used for redi stributed route s for this addre ss family.

OSPF Management

Open Shortest Path First (OSPF) is a TCP/IP internet routing protocol. OSPF is classified as an Interior
Gateway Protocol (IGP). This means that it distributes routing information between routers belonging
to a single Autonomous System (AS). The OSPF protocol is based on link-state or SPF technology based
on Dijkstra's algorithm. Each OSPF router maintains an identical database describing the Autonomous
System's t opology. From t hi s database, a routing tabl e is calculated by constructing a shortest -path tree.
OSPF has been designed expressly for the TCP/IP internet environment, including explicit support for
Classless Inter-Domain Routing (CIDR) and the tagging of externally-derived routing information.
OSPF also provides for the authentication of routing upd ates, Variable Length Subnet Masks (VLSM),
route summarization and utilizes IP multicast when sending/receiving the updates. OSPF recalculates
routes qui ckly in th e face of topol ogical ch anges , utiliz ing a minim um of routi ng protoc ol traffic.

OSPF Configuration

The OSPF Configuration window allows the user to enable or remove OSPF configurations on a router.
The OSPF configuration section covers the following topics:
•Viewing the OSPF Configuration Window
•Config Tab—Detailed Description
•Adding an OSPF Process
•Removing an OSPF Process
•Viewing the Network Tab on the OSPF Con figuration Window
•Network Ta b—Detailed Description
•Configuring a Network
•Configure Network—Detailed Description

Viewing the OSPF Configuration Window

To view the Config tab on the OSPF Configuration window for a chassis, proceed as follows:
Step 1 Right clic k on the chas sis objec t and choose Configuration>OSPF>OSPF Configuration. See
Tab le 14-1 on page 14-2 for information on which objects allow you to launch the OSPF Configuration
window.