Asante Technologies 35516 user manual Adjust Timers, Enable or Disable Split-horizon

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Apply Offsets to Routing Metrics

An offset list is the mechanism for increasing incoming and outgoing metrics to routes learned via RIP. You can limit the offset list with an access list. To increase the value of routing metrics, perform the following task in router configuration mode.

Command

Purpose

offset-list access-list-name{ in out}

Apply an offset to routing metrics.

5.4.9 Adjust Timers

Routing protocols use several timers that determine such variables as the frequency of routing updates, the length of time before a route becomes invalid, and other parameters. These timers can be adjusted to fine- tune the routing protocol performance to better suit the inter-network needs.

The default settings for the various timers are as follows:

•The update timer is 30 seconds. During every update, the RIP process sends an unsolicited response message containing the complete routing table to all neighboring RIP routers

•The timeout timer is 180 seconds. Upon expiration of the timeout, an unresponsive route becomes invalid; however, it is retained in the routing table for a short time so that neighbors can be notified that the route has been dropped

•The garbage collect timer is 120 seconds. Upon expiration of the garbage-collection timer, the unresponsive route is finally removed from the routing table

To adjust the timers, use the following command in router configuration mode.

Command

Purpose

timers basic update timeout garbage

Adjust routing protocol timers.

5.4.10 Enable or Disable Split-horizon

Normally, routers that are connected to broadcast-type IP networks, and that use distance-vector routing protocols, employ split horizon with poison reverse to reduce the possibility of routing loops.

The split horizon with poison reverse mechanism blocks information about routes from being advertised by a router out any interface from which that information originated. This behavior usually optimizes communications among multiple routers, particularly when links are broken. However, with non-broadcast networks, such as Frame Relay, situations can arise for which this behavior is less than ideal. For these situations, a user might want to disable split horizon. If an interface is configured with secondary IP addresses and split horizon is enabled, updates might not be sourced by every secondary address. Only one routing update is sourced per network numbe, unless split horizon is disabled.

To enable or disable split horizon, perform the following tasks in interface configuration mode.

Command

Purpose

ip rip poison reverse

Enable split horizon with

 

poison reverse.

no ip rip poison reverse

Disable split horizon with

 

poison reverse.

5.4.11 Manage Authentication Keys

If you are sending and receiving RIP Version 2 packets, you can enable RIP authentication on an interface. RIP Version 1 does not support authentication.

The IC35516 software supports two modes of authentication on an interface for which RIP authentication is enabled: plain text authentication and MD5 authentication. The default authentication in every RIP Version 2 packet is plain text authentication.

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Contents IntraCore 35516 Series IntraCore 35516 Series Technical SupportTable of Contents Page Features IntroductionPackage Contents LEDsFront and Back Panel Descriptions GbicManagement and Configuration Console InterfaceHardware Installation and Setup Installation OverviewSafety Overview Recommended Installation ToolsInstallation into an Equipment Rack Power RequirementsEnvironmental Requirements Cooling and AirflowInstalling a Gbic Gigabit Interface ConvertersInstalling the Optional Emergency Power Supply Removing a GbicGbic Care and Handling System Information System up since 103443 Fri Feb 07Connecting Power Connecting to the Network1 10/100/1000BaseT Ports Cabling Procedures Setup Gigabit Ethernet Ports Cabling ProceduresConnecting to a Console User Access Verification Password Setting Passwords Unencrypted cleartext line passwordSpecifies an Unencrypted line password will follow Specifies a Hidden line password will followConfiguring an IP Address Setting a Default IP Gateway AddressRouterconfig-if-veth1# Restoring Factory Defaults System Boot ParametersRouterconfig# boot system flash bank1bank2 Understanding the Command Line Interface CLI User Top User Exec ModeAccess Each Command Mode Command Show ? PurposePrivileged Top Privileged Exec Mode Router enable Password Router#Command Purpose Global Configuration Mode Command Purpose Router# configure terminalCommand Exit end Ctrl-Z Purpose Interface Configuration Mode Router Configuration Mode Route-Map Configuration ModeAdvanced Features Supported within the Command Mode Command Help PurposeChecking Command Syntax Routerconfig# hostname ? Word This systems network nameRouterconfig# routed rip Invalid input detected at marker Routerconfig# route Ambiguous command. Routerconfig#Using CLI Command History Using the No and Default Forms of CommandsUsing Command-Line Editing Features and Shortcuts Routerconfig# router Command incomplete. Routerconfig#Moving Around on the Command Line Completing a Partial Command NameRouter# confTab Router# configure Keystrokes PurposeEditing Command Lines that Wrap Router# co? configure copy Router# coDeleting Entries Keystrokes Purpose Press the Delete or BackspaceRedisplaying the Current Command Line Scrolling Down a Line or a ScreenTransposing Mistyped Characters Controlling CapitalizationPasswords and Privileges Commands Enable PasswordPassword Routerconfig-line# password AsanteService Password-Encryption Managing the System and Configuration Files Setting the System ClockChanging the Password Managing the SystemEnable the System Log Displaying the Operating ConfigurationTrace Packet Routes Test Connections with Ping TestsManaging Configuration Files Configuring from the TerminalConfiguration to Nvram Routerconfig# hostname newname Newnameconfig# endCopying Configuration Files to a Network Server Configuring Snmp and Spanning Tree Configuring Snmp SupportRunning-config Startup-configConfiguring Spanning Tree Protocol STP Create or Modify Access Control for Snmp CommunityRouterconfig# duplicate-ip detect Disable the Snmp ProtocolForward Time Hello TimeMaximum Age PriorityRouterconfig# mac-address-table aging-time MAC Address TablePort Priority Port Path CostConfiguring IP Configuring IP AddressingAssign IP Addresses to Network Interfaces Class Address or Range StatusCommand Purpose Assign Multiple IP Addresses to Network InterfacesCidr Prefix Class C Equivalent Host Addresses Establish Address Resolution Configuring IP RoutingDefine a Static ARP Cache SecondaryConfiguring Static Routes Route Source Default DistanceConfiguring RIP Enable RIPAllow Unicast Updates for RIP Neighbor ip-addressCommand Purpose Route-map map-tagdeny permit sequence Specify a RIP VersionRedistribute Routing Information Set Administrative Distance Set Metrics for Redistributed RoutesGenerate a Default Route Suppress Routing Updates through an InterfaceFiltering Routing Information Adjust Timers Enable or Disable Split-horizonManage Authentication Keys Command Purpose Offset-list access-list-name in outConfiguring IP Multicast Routing Monitor and Maintain RIPConfiguring Igmp Modifying the Igmp Host-Query Message IntervalPurpose Ip igmp query-interval 1-65535 seconds Command Configuring the Router as a Statically Connected MemberChanging the Igmp Version SecondsConfiguring Dvmrp Nbr-timeout 35-8000 secondsDefault value 180 seconds Command Purpose Route-expire-time 20-4000 secondsDefault value 200 seconds Report-intervalUsing Access Lists Create a Standard Access ListCreate an Expanded Access List Destination address to match. e.gCreating an Access List with a Name Applying an Access List to an InterfaceOperator equal to Operator greater thenConfiguring Ospf Enable OspfConfigure ABR Type Command Purpose Router ospf StepConfigure Compatibility Configure Ospf Interface ParametersConfigure Ospf Network Type Configure Ospf for Non-broadcast Networks Configure Area ParametersConfigure Ospf Not So Stubby Area Nssa Command Purpose Neighbor ip-address priority numberConfigure Route Summarization between Ospf Areas Command Purpose Area area-idvirtual-link router-idhelloCreate Virtual Links Not-advertisedControl Default Metrics Configure Route Calculation TimersRefresh Timer Configuration Redistribute Routes into OspfChange the Ospf Administrative Distances Prevent Routes from being Advertised in Routing UpdatesCommand Purpose Distance ospf external distance1 inter-area Suppress Routes on an InterfaceRouter ip-address NameVrrp Configuration Virtual Router Redundancy Protocol VrrpConfiguring Icmp Router Discovery Protocol Irdp Enable Irdp ProcessingMonitoring and Maintaining the Network Change Irdp ParametersCommand Purpose Show arp interface Show access-lists access-listShow ip prefix-list prefix-list-name Show ip irdpVlan Configuration Creating or Modifying a VlanRouterconfig# interface veth2 vlan Routerconfig-if-veth2# Routerconfig# no vlan Routerconfig# exit Router# show vlanDeleting a Vlan Static Access Vlan Port Membership ModesTrunk Ieee 802.1Q Command Purpose Routerconfig# vlan dot1q tag native 3 Dot1q TunnelTrunk allowed vlan add all except Mode dot1q-tunnel Appendix A. Basic Troubleshooting Problem Possible SolutionsAppendix B. Specifications Physical CharacteristicsTechnical Support and Warranty Standards ComplianceAppendix C. FCC Compliance and Warranty Statements FCC Compliance Statement Important Safety InstructionsIntraCare Warranty Statement Page Pin Number Signal Name Appendix D. Console Port Pin OutsAppendix E. Online Warranty Registration
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