Cisco Systems 12000/10700 V3.1.1 manual Ospf Management, Ospf Configuration, 14-47

Chapter 14 Routing

OSPF Management

AS/Tag—Indicates the Process ID of the redistributed protocol. A Positive Integer will indicate the 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 redistributed routes for this address 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 topology. From this database, a routing table 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 updates, Variable Length Subnet Masks (VLSM), route summarization and utilizes IP multicast when sending/receiving the updates. OSPF recalculates routes quickly in the face of topological changes, utilizing a minimum of routing protocol 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 Configuration Window

•Network Tab—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 click on the chassis object and choose Configuration>OSPF>OSPF Configuration. See Table 14-1 on page 14-2for information on which objects allow you to launch the OSPF Configuration window.

	Cisco 12000/10700 v3.1.1 Router Manager User Guide
OL-4455-01		14-47