Cisco Systems C819HG4GVK9, C819GUK9 manual Setting Transmit Delay, Configuring DTR Signal Pulsing

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Chapter 8 Configuring the Serial Interface

How to Configure Serial Interfaces

DETAILED STEPS

 

Command or Action

Purpose

 

 

 

Step 1

invert txclock

Inverts the clock signal on an interface.

 

Example:

 

 

Router(config-if)# invert txclock

 

 

 

 

Step 2

invert rxclock

Inverts the phase of the RX clock on the UIO serial

 

 

interface, which does not use the T1/E1 interface.

 

Example:

 

 

Router(config-if)# invert rxclock

 

 

 

 

Setting Transmit Delay

It is possible to send back-to-back data packets over serial interfaces faster than some hosts can receive them. You can specify a minimum dead time after transmitting a packet to remove this condition. This setting is available for serial interfaces on the MCI and SCI interface cards and for the HSSI or MIP. Use one of the following commands, as appropriate for your system, in interface configuration mode.

Command

Purpose

 

 

Router(config-if)# transmitter-delay

Sets the transmit delay on the MCI and SCI synchronous serial interfaces.

microseconds

 

 

 

Router(config-if)# transmitter-delay

Sets the transmit delay on the HSSI or MIP.

hdlc-flags

 

 

 

Configuring DTR Signal Pulsing

You can configure pulsing Data Terminal Ready (DTR) signals on all serial interfaces. When the serial line protocol goes down (for example, because of loss of synchronization), the interface hardware is reset and the DTR signal is held inactive for at least the specified interval. This function is useful for handling encrypting or other similar devices that use the toggling of the DTR signal to reset synchronization. To configure DTR signal pulsing, use the following command in interface configuration mode.

Command

Purpose

 

 

Router(config-if)# pulse-timeseconds

Configures DTR signal pulsing.

 

 

Ignoring DCD and Monitoring DSR as Line Up/Down Indicator

By default, when the serial interface is operating in DTE mode, it monitors the Data Carrier Detect (DCD) signal as the line up/down indicator. By default, the attached DCE device sends the DCD signal. When the DTE interface detects the DCD signal, it changes the state of the interface to up.

In some configurations, such as an SDLC multidrop environment, the DCE device sends the Data Set Ready (DSR) signal instead of the DCD signal, which prevents the interface from coming up. To tell the interface to monitor the DSR signal instead of the DCD signal as the line up/down indicator, use the following command in interface configuration mode.

 

 

Cisco 819 Series Integrated Services Routers Software Configuration Guide

 

 

 

 

 

 

OL-23590-02

 

 

8-11

 

 

 

 

 

Image 85
Contents Text Part Number OL-23590-02 September 2 Americas HeadquartersPage N T E N T S Data Account Provisioning Configuring a Cellular Interface Specifying a Synchronous Serial Interface Create a Cisco Easy VPN Remote Configuration NAT Getting Help TACACS+ OL-23590-02 General Description Product Overview1shows the Cisco 819HG ISR 3G Features New FeaturesSKU Information Platform Features Wlan FeaturesSecurity Features ScanSafe Wireless Device OverviewLEDs Tftp support with Ethernet WAN interfaceColor Description Rssi Router# show controllers cellular Wlan Features Wireless Local Area NetworkDual-Radio Images Supported CleanAir TechnologyDynamic Frequency Selection LEDsWlan LED OL-23590-02 4G LTE Wireless WAN OL-23590-02 Basic Router Configuration Interface Ports Default ConfigurationRouter Interface Port Label Information Needed for Configuration OL-23590-02 Line aux console tty vty line-number Password password Login Configuring Command-Line AccessExample Command PurposeSession login Enables password checking at the virtual terminalExits line configuration mode and returns to Privileged Exec modeConfiguring Global Parameters Configuring a Gigabit Ethernet WAN Interface Configuring WAN InterfacesNo shutdown Exit Example Configuring the Cellular Wireless WAN InterfaceRestrictions for Configuring the Cellular Wireless Interface Prerequisites for Configuring the 3G Wireless InterfaceData Account Provisioning Command or Action PurposeSignal strength, the network security, and so on Shows the radio signal strengthDetails about the command parameters Displays the cellular gps informationActivation and Provisioning Process Carrier 2lists the modem data profile parametersManual Activation Cellular unit cdma activate manual mdn msid mslCellular cdma activate iota Activating with Over-the-Air Service ProvisioningRouter # cellular 0 cdma activate otasp phonenumber Configuring a Cellular Interface Interface cellular Dialer string string Configuring DDREnables DDR and configures the specified serial Enters global configuration modeSpecifies the number of the dialer access group to Enters the global configuration modeSpecifies a default modem chat script Specifies the line configuration mode. It is alwaysExits line configuration mode Configures this line for GSMThis section provides the following configuration examples Examples for Configuring Cellular Wireless InterfacesFollowing shows how to configure an HSPA+ modem Tunnel over Cellular Interface ConfigurationCommand Syntax Description Configuring Dual SIM for Cellular NetworksFollowing command forces the modem to connect to SIM1 Perform the following commands to manually switch the SIMCellular GSM SIM Locks or unlocks the SIMOutput When Button Is Pushed Example Output When Button Is Not Pushed ExampleRommon Behavior IOS Behavior Configuring the Fast Ethernet LAN Interfaces Configuring a Loopback InterfacePush Button in Wlan AP Router# show interface loopback Verifying ConfigurationAnother way to verify the loopback interface is to ping it Configuring Static RoutesVerifying Configuration Configuring Dynamic RoutesExample Command Task Configuring Routing Information ProtocolRouter rip Version 1 No auto-summary EndRouter eigrp as-number Configuring Enhanced Interior Gateway Routing ProtocolBe applied, using the IP address of the network Enters router configuration mode and enablesEigrp on the router. The autonomous-system Number identifies the route to other Eigrp routersOL-23590-02 Configuring Backup Interfaces Configuring Backup Data Lines and Remote Management819 Yes Interface for which you want to configure backup Enters interface configuration mode forAssigns an interface as the secondary or backup Be configured to back up a serial 0 interfaceConfiguring DDR Backup Using Dialer Watch Configuring Cellular Dial-on-Demand Routing BackupConfigure terminal Dialer watch group group-numberDo not use the access list permit all command to Enables dialer watch on the backup interfaceUsing the chat script command Specifies the interfaceConfiguring DDR Backup Using Floating Static Route No aaa new-model Source-interface Dialer2 Line vty 0 4 login Scheduler max-task-time Webvpn cef end Dial Backup and Remote Management Through the Auxiliary Port Ip name-server server-address Ip dhcp pool name Exit Configure the Dhcp address pool. For Enters Dhcp pool configuration mode. The nameSample commands that you can use in Dhcp Pool configuration mode, see the ExampleEnters configuration mode for the line interface Exits the configure interface mode Switches the port from console to auxiliary portEnters configuration mode for the auxiliary Enables hardware signal flow controlPpp authentication pap callin PC IP address behind CPE OL-23590-02 Router# show environment Environmental and Power ManagementCisco EnergyWise Support Environmental and Power Management Cisco EnergyWise SupportWAN Concentration Configuring the Serial InterfaceProduct Number Cable Type Length Connector Type Configuring Serial InterfacesLegacy Protocol Transport Cisco Hdlc Encapsulation Information About Configuring Serial InterfacesPPP Encapsulation Multilink PPP Keepalive TimerFrame Relay Encapsulation Configuring a Synchronous Serial Interface How to Configure Serial InterfacesLMI on Frame Relay Interfaces This section contains the following tasksSpecifying a Synchronous Serial Interface Configures synchronous serial encapsulationSpecifying Synchronous Serial Encapsulation Configures an Sdlc interface for half-duplex mode Configuring PPPSignals Using the Nrzi Line-Coding Format Configuring Compression of Hdlc DataEncapsulation hdlc Compress stac Nrzi-encodingEnabling the Internal Clock Inverting the Transmit Clock SignalTransmit-clock-internal Invert txclock Invert rxclockConfiguring DTR Signal Pulsing Setting Transmit DelayIgnoring DCD and Monitoring DSR as Line Up/Down Indicator Configures the DCE to use Scte from the DTE Dce-terminal-timing enableSpecifying the Serial Network Interface Module Timing Ignore-dcdDte-invert-txc Specifies timing configuration to invert TXC clockUnderstanding Half-Duplex DTE and DCE State Machines Configuring Low-Speed Serial InterfacesHalf-Duplex DCE State Machines Half-Duplex DCE Transmit State Machine No half-duplex controlled-carrier Constant-carrier modePlaces a low-speed serial interface Changing Between Synchronous and Asynchronous Modes Sdlc cts-delay Sdlc rts-timeoutPhysical-layer sync async Interface Enablement Configuration Examples Configuration ExamplesReturns the interface to its default mode, which is No physical-layerHalf-Duplex Timers Example Synchronous or Asynchronous Mode ExamplesLow-Speed Serial Interface Examples Authentication, Authorization, and Accounting Configuring Security FeaturesConfiguring Access Lists Configuring AutoSecureConfiguration Commands ACL TypeAccess Groups Configuring Cisco IOS FirewallConfiguring VPN Configuring Cisco IOS IPSURL Filtering Remote Access VPN Branch office containing multiple LANs and VLANs Site-to-Site VPNVPN client-Cisco 819 ISR Corporate office networkConfigure a VPN over an IPSec Tunnel Configuration ExamplesConfigure the IKE Policy Command or Action Purpose Domain name Exit Configure Group Policy InformationExits IKE group policy configuration mode Apply Mode Configuration to the Crypto MapFor details about this command and additional Specifies a local address pool for the groupEnable Policy Lookup Configure the IPSec Crypto Method and Parameters Configure IPSec Transforms and ProtocolsCrypto ipsec profile profile-name See Cisco IOS Security Command Reference for Apply the Crypto Map to the Physical Interface Where to Go NextCrypto map map-name Exit Crypto ipsec client ezvpn name Create a Cisco Easy VPN Remote ConfigurationCrypto ipsec client ezvpn name outside inside Exit Configuration Example Configure a Site-to-Site GRE Tunnel Creates a tunnel interface and enters interface Returns to global configuration mode No cdp run Switch Port Numbering and Naming Configuring the Ethernet SwitchesRestrictions for the FE Switch 10-1Information About Ethernet Switches Overview of Snmp MIBs Switched Port AnalyzerIgmp Snooping Storm ControlRouterconfig#snmp-server community public RW BRIDGE-MIB for Layer 2 Ethernet SwitchingMIBs MIBs Link 10-410-5 MAC Address NotificationConfiguring VLANs How to Configure Ethernet SwitchesVLANs on the FE Ports 10-6Switchport mode dynamic desirable Configuring Layer 2 InterfacesVLANs on the GE Port Comand PurposeConfiguring Spanning Tree Protocol Configuring 802.1x Authentication10-8 Configuring Cisco Discovery Protocol Configuring MAC Table ManipulationPort Security 10-9Configuring IP Multicast Layer 3 Switching Configuring the Switched Port AnalyzerConfiguring Igmp Snooping Configuring Per-Port Storm Control10-11 Configuring Fallback Bridging10-12 Managing the Switch11-1 Configuring PPP over Ethernet with NATConfigure the Virtual Private Dialup Network Group Number Configuration TasksPPPoE 11-211-3 Configure the Fast Ethernet WAN Interfaces11-4 Configure the Dialer Interface11-5 Ip address negotiated Ip mtu bytes11-6 Configure Network Address Translation11-7 Ip nat inside outside No shutdown Exit11-8 11-9 Configuration Example11-10 11-11 Verifying Your Configuration11-12 12-1 Configuring a LAN with Dhcp and VLANsVLANs Configure Dhcp12-2 12-3 Detailed Steps12-4 Verify Your Dhcp ConfigurationVlan ? Configure VLANs12-5 Switchport access vlan vlan-id End Assign a Switch Port to a VlanExample 12-612-7 Verify Your Vlan ConfigurationRouter# vlan database 12-812-9 Router# show vlan-switch12-10 13-1 Configuring a VPN Using Easy VPN and an IPSec TunnelRemote, networked users Cisco Easy VPNVPN client-Cisco 819 ISRs VPN server-Easy VPN server13-3 Configure the IKE PolicyLifetime seconds Exit Internet Naming Service Wins servers Configure Group Policy InformationFor the group by using the wins command 13-513-6 Apply Mode Configuration to the Crypto MapLogin, and specifies the method used Enable Policy Lookup13-7 Configure the IPSec Crypto Method and Parameters Configure IPSec Transforms and Protocols13-8 13-9 Apply the Crypto Map to the Physical Interface Create an Easy VPN Remote Configuration13-10 13-11 Mode client network-extension network extension plus ExitFollowing example verifies your easy vpn connection Verifying Your Easy VPN Configuration13-12 13-13 13-14 Cisco IOS Software Basic Skills Configuring the Router from a PCPC Operating System Terminal Emulation Software Understanding Command ModesGlobal Enter the configure To exit to user Exec Use this mode toUser Exec Begin a session with As interface atmGetting Help Configuration mode Routing protocol AppropriateRouter Enter one of the router Router rip-fromEntering Global Configuration Mode Enable Secret Passwords and Enable PasswordsYou can now make changes to your router configuration Abbreviating Commands Using CommandsUndoing Commands Command-Line Error MessagesWhere to Go Next Saving Configuration ChangesSummary OL-18906-02 Network Protocols ConceptsRouting Protocol Options Protocol Ideal Topology Metric Routing UpdatesEnhanced Igrp PPP Authentication ProtocolsChap EthernetBackup Interface Dial BackupFloating Static Routes Dialer WatchEasy IP Phase QoS PPP Fragmentation and Interleaving IP PrecedenceLow Latency Queuing Access ListsOL-18906-02 Config-reg Resets the configuration register Configure terminal Enters global configuration modeROM Monitor Entering the ROM MonitorExits global configuration mode ROM Monitor CommandsReload Prompt increments with each new lineDisaster Recovery with Tftp Download Command DescriptionsCommand Description Variable Command Tftp Download Command VariablesRequired Variables Configures how the router displays file Using the Tftp Download CommandOptional Variables You will see an output similar to the following ExamplesType Embedded AP s Appendix C ROM Monitor Appendix C ROM Monitor Configuration Register Configuration RegisterChanging the Configuration Register Using Prompts Changing the Configuration Register ManuallyConsole Download Command DescriptionError Reporting Debug CommandsContext-Displays processor context for example Appendix C ROM Monitor Exiting the ROM Monitor Exiting the ROM MonitorPort Keyword Description Common Port AssignmentsISO-Transport Service Access Point Any private RJE serviceProcedure Call Authentication service
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