02.10.2013 Views

FTOS Configuration Guide for the C-Series - Force10 Networks

FTOS Configuration Guide for the C-Series - Force10 Networks

FTOS Configuration Guide for the C-Series - Force10 Networks

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Assign OSPF area<br />

After OSPF is enabled, assign <strong>the</strong> interface to an OSPF area. Set up OSPF Areas and enable OSPF on an<br />

interface with <strong>the</strong> network command.<br />

You must have at least one AS area: Area 0. This is <strong>the</strong> Backbone Area. If your OSPF network contains<br />

more than one area, you must also configure a backbone area (Area ID 0.0.0.0). Any area besides Area 0<br />

can have any number ID assigned to it.<br />

The OSPF process evaluates <strong>the</strong> network commands in <strong>the</strong> order <strong>the</strong>y are configured. Assign <strong>the</strong> network<br />

address that is most explicit first to include all subnets of that address. For example, if you assign <strong>the</strong><br />

network address 90.0.0.0 /8, you cannot assign <strong>the</strong> network address 90.1.0.0 /16 since it is already included<br />

in <strong>the</strong> first network address.<br />

When configuring <strong>the</strong> network command, you must configure a network address and mask that is a<br />

superset of <strong>the</strong> IP subnet configured on <strong>the</strong> Layer-3 interface to be used <strong>for</strong> OSPF.<br />

Use <strong>the</strong>se commands in <strong>the</strong> following sequence in CONFIGURATION ROUTER OSPF mode to set up<br />

neighbors and OSPF area. The Area can be assigned by a number or with an IP interface address.<br />

Command Syntax Command Mode Usage<br />

network ip-address mask area area-id CONFIG-ROUTER-OSPF Enable OSPF on an interface and<br />

assign an network address range to<br />

a specific OSPF area.<br />

IP Address Format: A.B.C.D/M<br />

Area ID Range: 0-65535 or<br />

A.B.C.D/M<br />

Enable OSPF on <strong>the</strong> interfaces<br />

Each interface must have OSPF enabled on it. It must be configured <strong>for</strong> Layer 3 protocol, and not be<br />

shutdown. OSPF can also be assigned to a loopback interface as a virtual interface.<br />

OSPF functions and features, such as MD5 Au<strong>the</strong>ntication, Grace Period, Au<strong>the</strong>ntication Wait Time, etc,<br />

are assigned on a per interface basis.<br />

Note: If using features like MD5 Au<strong>the</strong>ntication, ensure all <strong>the</strong> neighboring routers are also<br />

configured <strong>for</strong> MD5.<br />

Figure 383 presents an example of assigning an IP address to an interface and <strong>the</strong>n assigning an OSPF area<br />

that includes that Layer-3 interface’s IP address.<br />

Figure 383 Configuring an OSPF Area Example<br />

Force 10 recommends that <strong>the</strong> OSPF Router ID be <strong>the</strong> interface IP addresses. This makes troubleshooting<br />

easier.<br />

542 Open Shortest Path First

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!