HP Routing Services -UX 11i v2 manual Conﬁguring the Ospf Protocol

Page 60

Conﬁguring gated

Conﬁguring the OSPF Protocol

Conﬁguring the OSPF Protocol

Open Shortest Path First (OSPF) is a link-state routing protocol that distributes routing information between routers in a single autonomous system (AS). Each OSPF router transmits a packet with a description of its local links to all other OSPF routers. The distributed database is built from the collected descriptions. Using the database information, each router constructs its own routing table of shortest paths from itself to each destination in the AS.

OSPF allows you to organize routers, networks, and subnetworks within an AS into subsets called areas. An area is a grouping of logically contiguous networks and hosts. Instead of maintaining a topological database of the entire AS, routers in an area maintain the topology for only the area in which they reside. Therefore, all routers belonging to an area must be consistent in their conﬁguration of the area. The topology of an area is hidden from systems that are not part of the area. The creation of separate areas can help minimize overall routing trafﬁc in the AS. Figure 3-3 shows an example of three separate areas deﬁned for an AS.

60

Chapter 3

Image 60

Contents Edition Manufacturing Part Number B2355-90777 AugustWarranty Government LicenseCopyright Notice Trademark Notices Page Contents Contents Index Contents Intended Audience HP-UX Release Name and Release IdentiﬁerWhat Is in This Document Publishing HistoryDocument Organization Chapter Description HP-UX Internet Services Administrator’s Guide Related DocumentationMbone FAQ Typographical ConventionsHP Encourages Your Feedback BoldVersion of HP-UX that you are using Overview Overview Mrouted Routing Daemon Multicasting OverviewDvmrp Protocol Dvmrp Tunnel Dvmrp Tunnel MulticastEndpoint IP Multicast Addresses Class D IP Multicast Address FormatMulticast Groups Mrouted Routing Daemon Gated Routing Daemon AdvantagesDeciding When to Use gated Routing Protocols Comparison of RIP and Ospf Protocols RIP OspfRIP Ospf Gated Routing Daemon Gated Routing Daemon Chapter Conﬁguring mrouted Conﬁguring mrouted How to Conﬁgure mrouted Conﬁguration CommandsTunnel Multicast Network Example Conﬁguration How to Conﬁgure mrouted How to Conﬁgure mrouted Starting mrouted Verifying mrouted Operation Displaying mrouted Routing Tables HUP Displaying mrouted Routing Tables Multicast Routing Support Tools Mrinfo ToolMap-mbone Tool Netstat ToolMulticast Routing Support Tools Chapter Conﬁguring gated Conﬁguring gated Conﬁguration Overview Conﬁguring gated Protocol statements follow Converting the Conﬁguration File from 3.0 to Cp /etc/gated.conf /etc/gated.conf.30 Conﬁguring the RIP Protocol RIP Protocol StatementDefault Range 1 Conﬁguration Options Simple RIP Conﬁguration Example of Simple RIP ConﬁgurationEnd Systems RoutersExample of a Large RIP Conﬁguration RIP RouterMajor Router Cluster Node Isolated NodeRoot Server Single NodeCluster or Root Server Node Controlling RIP Trafﬁc Major RouterConﬁguring the RIP Protocol Conﬁguring the Ospf Protocol Areas Deﬁned in an Autonomous System AreaNetwork Router Area Conﬁguring the Ospf Protocol Planning Your Ospf Conﬁguration Enabling Ospf Deﬁning Areas Area Border Router Conﬁguration ExampleArea To Network a 193.2.1.33 Border Router To Network B Networks Statement Network Conﬁguration ExampleInterface Statement Conﬁguring the Ospf Protocol Default None Multicast Router Interface Example Router 193.2.1.35 NetworkRange 0 Non-Broadcast Router Interface ExampleRouter Network 193.2.1.35 193.2.1.33 Internet 193.2.1.46 Hellointerval value must be the same for all Ospf routers Conﬁguring the Ospf Protocol Point-to-Point Router Interface Example Router 193.2.1.1 193.2.1.2Stub Areas Area Router 193.2.1.20 193.2.1.17 193.2.1.18 193.2.1.19Deﬁning Backbones Area 15.13.115.156 Router a Router BAuthentication Authkey travis Authkey pepeCost Cost LAN 1 LAN 2AS External Routes AS Boundary Routers Only Default Conﬁguring the Ospf Protocol Sample Ospf Conﬁguration Internal Router Non-Stub AreaArea Border Router Internal Router Stub Area Accessing the Ospf MIB Conﬁguring RDP RDP ServerRDP Client Server RDP ClientSpecifying a Default Router Installing Static RoutesCustomizing Routes Setting Interface States Specifying Tracing Options Files Option EffectDefault Preference Values of Routes Specifying Route PreferenceRoute Type Preference BGP Specifying Route Preference Importing and Exporting Routes Import StatementExport Statement Examples of import and export Statements Command Line Options for gated Starting gatedFlag Effect Verifying That gated Is Running 100Troubleshooting gated Checking for Syntax Errors in the Conﬁguration FileTracing gated Activity Operational User Interface for gated gdc 102Gated Routing Table Ripquery ToolOspfmonitor Tool Common Problems Problem 1 gated does not act as expected104 Chapter 105 Problem 2 gated deletes routes from the routing table 106Problem 3 gated adds routes that appear to be incorrect Problem 4 gated does not add routes that you think it must 108Index 109110 111 112 TOS 113