HP Routing Services -UX 11i v2 manual Problem 2 gated deletes routes from the routing table, 106

Page 106

Conﬁguring gated

Troubleshooting gated

lan2	Index 3 Address	802.2 8:0:9:3d:2c:b1	Change: <>
State: <>
	Refcount: 2	Up-down transitions:	0
	198.1.1.17

	Metric:	0	MTU:	1436
	Refcount: 4		Preference: 0		Down: 120
	Change: <>		State: <Up Broadcast Multicast
>
	Broadcast Address:			198.1.1.255
	Subnet Number: 198.1.1				Subnet Mask: 2
55.255.255
lan1	Index 4 Address	802.2 8:0:9:3d:3c:69			Change: <>
State: <>
	Refcount: 2	Up-down transitions: 0
	198.2.1.40
	Metric:	0	MTU:	1436
	Refcount: 4		Preference: 0		Down: 120
	Change: <>		State: <Up Broadcast Multicast
NoAge>
	Broadcast Address:			198.2.1.255
	Subnet Number: 198.2.1				Subnet Mask: 2
55.255.255

Interface policy:

Interface lan0 lan1 lan3 passive

The state recorded in lan2 does not contain the NoAge ﬂag, because the interface was not set to passive in the interface policy statement.

A common mistake is to expect gated to always send out RIP packets when you specify rip yes in a conﬁguration ﬁle. gated will be an active RIP participant only if the host is a router (that is, when the host has more than one network interface).

Problem 2: gated deletes routes from the routing table.

gated maintains a complete routing table in user space, and synchronizes this table with the kernel routing table. When gated starts, it reads the entries in the kernel routing table. However, if gated does not get conﬁrmation from its routing protocols (RIP, OSPF, and so on) about a route, it deletes the route from its tables and from the kernel routing table.

106

Chapter 3

Image 106

Contents Edition Manufacturing Part Number B2355-90777 AugustGovernment License WarrantyCopyright Notice Trademark Notices Page Contents Contents Index Contents Intended Audience HP-UX Release Name and Release IdentiﬁerPublishing History What Is in This DocumentDocument 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 Multicasting Overview Mrouted Routing DaemonDvmrp Protocol Dvmrp Tunnel Multicast Dvmrp TunnelEndpoint 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 Map-mbone Tool Multicast Routing Support ToolsMrinfo 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 End Systems Simple RIP ConﬁgurationExample of Simple RIP Conﬁguration RoutersExample of a Large RIP Conﬁguration RIP RouterRoot Server Major RouterCluster Node Isolated Node Single NodeCluster or Root Server Node Controlling RIP Trafﬁc Major RouterConﬁguring the RIP Protocol Conﬁguring the Ospf Protocol Area Areas Deﬁned in an Autonomous SystemNetwork Router Area Conﬁguring the Ospf Protocol Planning Your Ospf Conﬁguration Enabling Ospf Area Border Router Conﬁguration Example Deﬁning AreasArea 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 NetworkNon-Broadcast Router Interface Example Range 0Router 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 Router 193.2.1.1 193.2.1.2 Point-to-Point Router Interface ExampleStub 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 ClientInstalling Static Routes Specifying a Default RouterCustomizing Routes Setting Interface States Specifying Tracing Options Files Option EffectSpecifying Route Preference Default Preference Values of RoutesRoute Type Preference BGP Specifying Route Preference Import Statement Importing and Exporting RoutesExport Statement Examples of import and export Statements Starting gated Command Line Options for gatedFlag Effect Verifying That gated Is Running 100Checking for Syntax Errors in the Conﬁguration File Troubleshooting gatedTracing gated Activity Operational User Interface for gated gdc 102Ripquery Tool Gated Routing TableOspfmonitor Tool Problem 1 gated does not act as expected Common Problems104 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