Cisco Systems OL-4580-01 instruction

Chapter 8 Configuring the DHCP Relay Agent

Displaying the DHCP Relay Configuration

	Cisco Content Services Switch Routing and Bridging Configuration Guide
8-6	OL-4580-01

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Cisco Systems OL-4580-01 manual

Contents

Software Version January Copyright 2004, Cisco Systems, Inc. All rights reserved N T E N T S Iii Configuring Circuits Showing Circuits Ospf Overview Setting the Retransmission Interval Vii Configuring the Internet Protocol Viii Enabling CDP OL-4580-01 Interface Trunking Between VLANs Xii Field Description for the show bridge port-fast Command Field Descriptions for the show ospf redistribute Command Xiv Preface How to Use This Guide AudienceThis guide is organized as follows Xvi Related Documentation Xvii Rmon Xviii TACACS+ Xix Symbols and Conventions Obtaining Documentation Cisco.comOrdering Documentation Xxi Documentation Feedback Obtaining Technical AssistanceCisco Technical Support Website Xxii Xxiii Opening a TAC CaseTAC Case Priority Definitions Obtaining Additional Publications and Information Xxiv Xxv Xxvi Configuring Interfaces and Circuits Interface and Circuit Overview OL-4580-01 CSS Interfaces and Circuits Interface and Circuit Configuration Quick Start Log in to the CSS Enter configuration mode by typing config# config Config# interface e1 Optional Display the interface configuration Optional Display the circuit configurationConfig# circuit VLAN1 Config# circuit VLAN3 Configuring Interfaces Configuring an Interface Command. For exampleEntering a Description for the Interface Text string from 1 to 255 characters including spaces Configuring Interface Duplex and Speed To remove an interface description, enter Configuring Interfaces and Circuits Setting Interface Maximum Idle Time Config-if1/1#phy auto-negotiate disable Bridging an Interface to a Vlan Specifying Vlan Trunking for an Interface Config-trunkif2/3# no trunk Selecting a Default Vlan in a Trunk To remove the default Vlan selection, enter Configuring Interfaces and Circuits Configuring Spanning-Tree Bridge Pathcost Configuring Spanning-Tree Bridge Port PriorityTo restore the default path cost, enter To restore the default port priority of 128, enter Configuring Port Fast on an Interface Configuring Spanning-Tree Bridge StateTo disable the bridge state, enter Config-ife7#bridge state enable Config-if2/1#bridge port-fast enable Config-if2/1#bridge port-fast disableConfig# bridge bpdu-guard enabled Enabling Port Fast Config# bridge bpdu-guard disabled Showing Port Fast Information Showing Interface Configurations Showing Bridge Configurations Vlan Bridge interface virtual LAN number Field Description Showing Trunking Configurations Showing Interface InformationPort CSS port Vlan on the port Showing Interface Duplex and Speed 6describes the fields in the show interface command outputConfig# show phy 2/1 7describes the fields in the show phy command output Showing Interface Statistics 8describes the fields in the show mibii command output Interface address at the protocol layer immediatelyThat do not have such an address for example, a serial line This object contains an octet string of zero length # clear statistics Showing Ethernet Interface Errors Number of frames received on the interface that are anIntegral number of octets in length but do not pass Frame check sequence FCS check Field Description Shutting Down an Interface Shutting Down All Interfaces Restarting an Interface Restarting All InterfacesTo shut down all interfaces, enter To restart all interfaces, enter Configuring Circuits Entering Circuit Configuration ModeConfiguring a Circuit IP Interface Config# circuit VLAN7 Configuring a Circuit IP Address Configuring a Circuit-IP Broadcast Address Configuring Circuit-IP Redirects Configuring Circuit-IP Unreachables To disable router discovery, enter Enabling and Disabling a Circuit IP100 Preference To revert to the default of 224.0.0.1, enter Configuring the Router-Discovery LifetimeConfiguring Router-Discovery Limited-Broadcast Configuring the Router-Discovery Max-Advertisement-Interval Configuring the Router-Discovery Min-Advertisement-IntervalMax-advertisement-interval Min-advertisement-interval To list an individual circuit, enter 10describes the fields in the show circuits command outputShowing Circuits # show ip interfaces Indicates whether RIP is Enabled or DisabledShowing IP Interfaces To stop running the RIP on the interface, enter Configuring RIP for an IP InterfaceEnabling RIP on an IP Interface Configuring RIP Send Version Configuring a RIP Default RouteConfiguring a RIP Receive Version Configuring RIP Packet Logging Showing RIP Configurations for IP Addresses 12describes the fields in the show rip command output # show rip globals # show rip statistics Configuring the Switched Port Analyzer Feature Example of Span Connectivity Configuring Span on a CSS Config# no setspan srcport 3/3 destport 3/12 Verifying the Span Configuration on a CSSConfig# setspan srcport 3/3 destport 3/12 copyBoth Field Description Configuring Spanning-Tree Bridging for the CSS Config# bridge aging-time Config# bridge forward-timeConfig# bridge hello-time CSS Spanning-Tree Bridging Quick Start Configuring Spanning-Tree Bridge Aging-Time To restore the default aging time of 300, enterSet the bridge spanning-tree maximum age, in seconds Recommended Display bridge forwarding information Configuring Spanning-Tree Bridge Hello-Time Configuring Spanning-Tree Bridge Max-AgeTo restore the default delay time of 4, enter To restore the default hello time interval of 1, enter Configuring Spanning-Tree Bridge Priority To restore the default maximum age of 6, enterDisabling Bridge Spanning-Tree To set the bridge maximum age to 21, enter Showing Bridge Configurations To disable spanning-tree bridging, enterTo reenable spanning-tree bridging, enter Config# bridge spanning-tree disable Field Description OL-4580-01 Configuring Open Shortest Path First Ospf Ospf Overview Ospf Routing Hierarchy Link-State Databases Ospf Routing Hierarchy Boundry Router2 Backbone Area Autonomous SystemAreas Autonomous System Boundary Routers Area Border RoutersStub Area Link-State Databases CSS Ospf Configuration Quick Start Global Ospf Configuration Quick Start Enable Ospf on the CSS Config# circuit VLAN6 Ospf IP Interface Configuration Quick StartAccess global configuration mode. Enter Configure the IP interface as an Ospf interface. Enter Verifying Your Configuration # show ospf global# show ospf redistribute # show ospf advertise Configuring Ospf on the CSS Configuring the Ospf Router IDTo delete the router ID on the CSS, disable Ospf and enter Config# ospf router-id Enabling Ospf Configuring an AreaTo disable OSPF, enter Removing an Area Configuring Equal-Cost RoutesConfiguring Summarized Routes at an ABR To remove the range, enter To remove the CSS as an AS boundary router, enter Advertising a Route as an Ospf ASE Route VIP is Config# ospf advertise 192.168.44.0 Config# no ospf advertise Preceded by an exclamation point Advertising a Default ASE Route Config# ospf default Config# ospf default metric 10 type1 Config# no ospf defaultConfig# ospf redistribute firewall Advertising Other Routes Through Ospf Configuring Ospf on a CSS IP Interface Config# ospf redistribute rip metric 3 type1Config# no ospf redistribute rip To stop advertising the RIP routes via OSPF, enter Configuring the CSS IP Interface as an Ospf Interface Configure this circuit as an Ospf circuit. Enter Configuring the Interface Attributes To reset the interface to the default backbone area, enterTo disable Ospf on the interface, enter Assigning an Ospf Area to the Interface Setting the Hello Packet Interval Setting the CostSetting the Dead Router Interval To remove the Ospf password from the interface, enter Setting the PasswordSetting the Poll Interval For example, to set the poll interval to 200 seconds, enter Setting the Priority of the CSSSetting the Retransmission Interval To set the retransmission interval to 10 seconds, enter Setting the Transit-Link DelayShowing Ospf Information 3describes the fields in the show ospf areas command output Showing Ospf Area InformationShowing Global Statistics To show information about Ospf areas, enter Showing IP Interface Information To show Ospf interfaces, enter Field Field Description Showing Link-State Databases # show ospf lsdb 6describes the fields in the show ospf lsdb command outputTo show the entire database, enter Field Description 7describes the fields in the show ospf ase command output Showing ASE EntriesTo show AS-external ASE entries in the LSDB, enter # show ospf ase # show ospf advertise 192.168.11.1/24 Showing the Configured Advertised ASE RoutesTo show the configuration of ASE routes into OSPF, enter Showing the Redistribution Policy Firewall Field Description Showing Summary Route Configuration Information To show the summary-route configuration information, enterShowing Ospf Neighbors To show the Ospf neighbors, enter 11 Field Descriptions for show ospf neighbors Command Field Description Field Description Ospf Configuration in a Startup-Configuration File OL-4580-01 Configuring the Address Resolution Protocol Define a static ARP mapping ARP Configuration Quick StartSet the time, in seconds, to wait for an ARP resolution Configuring ARP Mapping Config# no arp Configuring ARP Timeout Configuring ARP WaitTo restore the default wait time of 5 seconds, enter Config# no arp timeout # clear arp cache Updating ARP ParametersClearing ARP Parameters Show arp configfilemanagement-portsummaryiporhost Showing ARP Information 2describes the fields in the show arp command output # show arp summary To display the global ARP configuration, enter 4describes the fields in the show arp config command output# show arp config # show arp file To display the resolution for a host IP address, enter OL-4580-01 Configuring Routing Information Protocol RIP Configuration Quick Start Configure the CSS to advertise a route through RIPConfig# rip advertise 192.168.1.0/24 Config# rip redistribute static Config# no rip advertise 192.168.1.0/24 Configuring RIP AdvertiseConfiguring RIP Redistribute Configuring Equal-Cost RIP Routes Config# no rip equal-cost Showing RIP Configurations 3describes the fields in the show rip globals command output Field Descriptions for the show rip statistics Command OL-4580-01 Configuring the Internet Protocol IP Configuration Quick Start Configuring an IP Route Configuring the Internet Protocol Configuring an IP Route To remove a firewall route, enter For example, to configure a blackhole route, enterTo remove a static route, enter Config# no ip no-implicit-service Disabling an Implicit Service for the Static Route Next HopTo reset the default setting, enter Configuring an IP Source Route Configuring the IP Record RouteConfig# ip source-route Config# no ip source-route Configuring Box-to-Box Redundancy Configuring IP Equal-Cost MultipathTo disable box-to-box redundancy, enter Syntax for this global configuration command is Config# ip ecmp no-prefer-ingress Config# no ip ecmp no-prefer-ingressConfig# ip ecmp roundrobin Config# no ip subnet-broadcast Configuring IP Unconditional Bridging To restore the default behavior of the CSS, enterConfig# ip uncond-bridging Config# no ip uncond-bridging Example of Opportunistic Layer 3 Forwarding Showing IP Configuration Information Config# ip opportunistic allConfig# no ip opportunistic Config# ip route 0.0.0.0 /0 192.168.1.7 originated-packets Showing IP Global Configuration Parameters Whether RIP is enabled or disabled 4describes the fields in the show ip routes command output Showing IP Routing Information Which the next hop of this route should be reached Showing IP StatisticsIndex value that identifies the local interface through TCP Statistics Icmp Statistics ARP Statistics Resetting IP Statistics Showing a Summary of IP Global Statistics Field Description OL-4580-01 Configuring the Cisco Discovery Protocol CDP Configuration Quick Start Config# cdp holdTimeConfig# cdp timer Recommended Display and verify CDP information for the CSS Setting the CDP Hold Time To disable CDP transmissions on the CSS, enterConfig# no cdp holdTime Enabling CDP Showing CDP Information Setting the CDP Transmission RateConfig# no cdp timer Configuring the Dhcp Relay Agent Optional Verify the Dhcp configuration Dhcp Relay Agent Configuration Quick StartEnable the Dhcp relay agent on the CSS circuit To disable the Dhcp relay agent on the circuit, enter Config-circuitVLAN2#no dhcp relay-toAdding a Dhcp Destination on a Circuit Enabling and Disabling Dhcp on the Circuit Displaying the Dhcp Relay Configuration Config# no dhcp-agent max-hopsDefining the Hops Field Value for Forwarding Dhcp Messages # show dhcp-relay-agent global Field Description OL-4580-01 IN-1 Aging time, configuring for bridgingBpdu guard Displaying information Enabling CLI IN-2 DNS IN-3 IP Ecmp IN-4 IN-5 IN-6 IN-7 IN-8 Switched port analyzer. See also SpanMIB-II interface Ospf global Symbol overview Zero, resetting Ethernet statistics to IN-9 IN-10