Alcatel Carrier Internetworking Solutions 060187-10 REV D Ip ospf restart-support planned-only

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Configuring OSPF	Configuring OSPF

Configuring Redundant Switches in a Stack for Graceful Restart

By default, OSPF graceful restart is disabled. To configure OSPF graceful restart support use the ip ospf restart-supportcommand by entering ip ospf restart-supportfollowed by either planned-unplanned(the default) or planned-only.

For example, to modify OSPF graceful restart so that it only supports planned restarts enter:

-> ip ospf restart-support planned-only

To disable support for graceful restart use the no form of the ip ospf restart-supportcommand by enter- ing:

-> no ip ospf restart-support

Continuous forwarding during a graceful restart depends on several factors. If the secondary module has a different router MAC than the primary module, or if one or more ports of a VLAN belonged to the primary module, spanning tree re-convergence might disrupt forwarding state, even though OSPF performs a graceful restart.

Note. Graceful restart is only supported on active ports (i.e., interfaces), which are on the secondary or idle switches in a stack during a takeover. It is not supported on ports on a primary switch in a stack.

Optionally, you can configure graceful restart parameters with the following CLI commands:

ip ospf restart-interval	Configures the grace period for achieving a graceful OSPF restart.
ip ospf restart-helper status	Administratively enables and disables the capability of an OSPF router
	to operate in helper mode in response to a router performing a graceful
	restart.

ip ospf restart-helperstrict-lsa-checking-status

ip ospf restart initiate

Administratively enables and disables whether or not a changed Link State Advertisement (LSA) will result in termination of graceful restart by a helping router.

Initiates a planned graceful restart.

For more information about graceful restart commands, see the “OSPF Commands” chapter in the OmniSwitch CLI Reference Guide.

OmniSwitch 6600 Family Advanced Routing Configuration Guide March 2005

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Contents OmniSwitch 6600 Family Advanced Routing Configuration Guide Page Contents Alcatel INTERNETWORKING, INC. AII Unsupported Platforms Supported PlatformsWhat is in this Manual? When Should I Read this Manual?What is Not in this Manual? Who Should Read this Manual?Documentation Roadmap Stage 1 Using the Switch for the First TimeHow is the Information Organized? Anytime Stage 2 Gaining Familiarity with Basic Switch FunctionsStage 3 Integrating the Switch Into a Network Related Documentation OmniSwitch 6600 Family Getting Started GuideTechnical Support This Chapter Configuring OspfOspf Specifications Parameter Description Command Default Value/Comments Ospf Defaults TableOspf Quick Steps Router ID Admin Status = Enabled Admin Status = Enabled Operational Status = UpShow ip ospf area Area Identifier Area Type = normalOspf Hello Protocol Ospf OverviewOspf Intra-Area and Inter-Area Routing Ospf AreasClassification of Routers Ospf Routers Connected with a Virtual Link Virtual LinksOspf Stub Area Stub AreasTotally Stubby Area Example Not-So-Stubby-AreasEqual Cost Multi-Path Ecmp Routing Graceful Restart on Stacks with Redundant SwitchesNon Broadcast Ospf Routing Multiple Equal Cost PathsOspf Graceful Restart Helping and Restarting Router Example Configuring Ospf Preparing the Network for Ospf Loading the Software Activating OspfEnabling Ospf Removing Ospf from MemoryCreating an Area Creating an Ospf AreaEnabling an Area Specifying an Area TypeDeleting an Area Enabling and Disabling SummarizationDisplaying Area Status Setting Area Ranges Configuring Stub Area Default MetricsConfiguring a Totally Stubby Area No ip ospf area 1.1.1.1 default-metricEnter the following commands on Router B Creating an Interface Creating Ospf InterfacesAssigning an Interface to an Area Activating an InterfaceMD5 Encryption Interface AuthenticationSimple Authentication Ip ospf interface 120.5.80.1 dead-interval 50 cost Modifying Interface ParametersIp ospf interface 120.5.80.1 hello-interval Ip ospf interface 120.5.80.1 dead-intervalModifying Virtual Link Parameters Creating Virtual LinksCreating a Virtual Link Enabling Redistribution Creating Redistribution Policies and FiltersSpecifying an Autonomous System Boundary Router Creating a Redistribution Filter Creating a Redistribution PolicyShow ip ospf redist-filter rip Show ip ospf redist-filterShow ip ospf redist-filter rip 1.1.0.0 No ip ospf redist-filter rip 1.1.0.0Configuring Router Capabilities Ip ospf neighbor 1.1.1.8 eligible Configuring Static NeighborsIp ospf interface 1.1.1.1 type non-broadcast No ip ospf restart-support Ip ospf restart-support planned-onlyThree Area Ospf Network Ospf Application ExamplePrepare the Routers Ospf Application ExampleConfiguring Ospf Router Enable OspfOspf Application Example Examine the Network Verifying Ospf Configuration Alcatel License Agreement Software License and Copyright StatementsAlcatel License Agreement Software License and Copyright Statements OpenLDAP Public License Version 2.4, 8 December Booting and Debugging Non-Proprietary SoftwareThird Party Licenses and Notices Preamble LinuxGNU General Public License Version 2, June Third Party Licenses and Notices Software License and Copyright Statements Third Party Licenses and Notices Appendix How to Apply These Terms to Your New Programs Random.c University of CaliforniaCarnegie-Mellon University Agranat Apptitude, IncRSA Security Inc Sun Microsystems, IncNetwork Time Protocol Version Wind River Systems, IncIndex Index