Cisco Systems 78-13983-04 manual Ip rtp header-compression, Passive

Page 57

Chapter 5 Command Reference

ip rtp header-compression

ip rtp header-compression

To enable Real-Time Transport Protocol (RTP) header compression, use the ip rtp header-compressioninterface configuration command. To disable RTP header compression, use the no form of this command.

ip rtp header-compression [passive]

no ip rtp header-compression

Syntax Description

Defaults

Command Modes

Command History

passive	(Optional) Compresses outgoing RTP packets only if incoming RTP packets
	on the same interface are compressed. This option is not applicable on PPP
	links.

Disabled

Interface configuration

ReleaseModification

11.3	This command was introduced.

Usage Guidelines	If you use this command without the passive keyword, the software compresses all RTP traffic.
	You can compress IP/UDP/RTP headers and IP/UDP headers to reduce the size of your packets.
	Compressing headers is especially useful for RTP, because RTP payload size can be as small as 20 bytes,
	and the uncompressed header is 40 bytes.
	RTP header compression is supported on serial lines using PPP encapsulation. You must enable
	compression on both ends of a serial connection.

Examples	The following example enables RTP header compression on fast ethernet interface 1 and limits the
	number of RTP header compression connections to 10:
	interface serial 0
	encapsulation ppp
	ip rtp header-compression
	ip rtp compression-connections 10

Cisco MWR 1900 Mobile Wireless Edge Router Software Configuration Guide

	78-13983-04	5-5

Image 57

Contents Customer Order Number DOC-7813983= Text Part Number Corporate HeadquartersCopyright 2002 Cisco Systems, Inc All rights reserved Limitations and Restrictions First-Time Configuration Software FeaturesAbout This Guide AudienceSaving Configuration Changes Using the Setup Command FacilityConfiguring PIM Configuring PPP MultiplexingWhere to Go Next Configuring RedundancyMode y-cable Assigning a QoS Boilerplate to an InterfacePage Audience ObjectivesOrganization Chapter Title DescriptionConvention Description Document ConventionsBoldface font Boldface screenRelated Documentation Additional InformationObtaining Documentation World Wide WebDocumentation CD-ROM Obtaining Technical AssistanceOrdering Documentation Documentation FeedbackTo access Cisco.com, go to the following website Cisco.comTechnical Assistance Center Contacting TAC by Telephone Benefits Overview of the MWRCisco IOS Software Software FeaturesNetwork Processor Software MLP, PPP Control Path IPCP, NCP, LCP, ClnsRTP/UDP Header Compression PPP Multiplexing/DemultiplexingRTP Header Compression Redundancy SupportMWR 1900 supports the following MIBs MIB SupportRFC1213-MIB RFC1253-MIB802.1Q VLANs Frame Relay FR Limitations and RestrictionsUnderstanding Boot Images Before You BeginUnderstanding Interface Numbering Interface type Slot number/Interface number Using the Setup Command Facility Configuring Global ParametersBefore Starting Your Router Enter a host name for the router this example uses Viewing the configurationCompleting the Configuration You are then prompted to configure the specified interfaceSummary of interfaces is displayed First-Time Configuration Where to Go Next Where to Go NextGetting Help Cisco IOS Software BasicsConfigure terminal Understanding Command ModesExit , or logout As interface serial 0/0Saving Configuration Changes Undoing a Command or FeaturePage Configuring with the Command-Line Interface Enter global configuration mode Configuring the Host Name and PasswordPrompt changes to Routerconfig# Verifying the Version of Cisco IOS SoftwareExit to global configuration mode Configuring Loopback InterfacesExit interface configuration mode Change the name of the router to a meaningful nameConfiguring Fast Ethernet Interfaces Configuring the FE Interface IP AddressSetting the Speed and Duplex Mode Configuring Routing Protocol Attributes Configuring PIMSpecify the speed Configuring Hsrp Support Configuring Multilink Interfaces Enabling the FE InterfaceSpecify a priority Configuring Multilink PPP Configuring IP Address AssignmentEnable multilink PPP operation Configuring RTP/UDP Compression Configuring PPP MultiplexingTo set the default PPP protocol ID, enter To set the maximum length of the subframe, enterRPM-3config-if#ip rtp header-compression Configuring T1 Interfaces Configuring T1 and E1 InterfacesSet the carrier delay for the serial interface Configuring E1 InterfacesConfiguring QoS Attributes Creating a Policy Map Creating a Class Map78-13983-04 Configuring Redundancy Assigning a QoS Boilerplate to an InterfaceRedundant MWR 1900s Exit y-mode configuration mode Stand-Alone MWRSpecify the interface to be used for backhauling MWR1900-1#show running-config Verifying the ConfigurationMatch access-group Ip ospf message-digest-key 1 md5 mymd5pw Ip ospf Hello-interval Ospf Dead-interval Monitoring and Managing the MWR Command Purpose Show Commands for Monitoring the MWRShow controllers Show interface type slot / portShow protocols Command Reference Clear ip rtp header-compression Related Commands Description Command Modes Command History Usage Guidelines ExamplesClear ppp mux Clear ppp mux interface interfaceConnections Interface configuration Syntax Description Defaults Command ModesIp rtp header-compressionEnables RTP header compression Ip rtp compression-connectionsSyntax Description Defaults Command Modes Command History Ip rtp header-compressionPassive Related Commands Description Mode y-cable Mode y-cableStandalone Standby use-interfacePpp mux Command Modes Command HistoryPpp mux delay Ppp mux delay integer no ppp mux delayUsage Guidelines Examples Related Commands Default maximum length is Interface configuration Defaults Command Modes Command HistoryPpp mux frame Ppp mux frame integer no ppp mux framePpp mux pid integer Ppp mux pidPpp mux subframe length integer No ppp mux subframe length Ppp mux subframe lengthDefault maximum is Interface configuration Ppp mux subframe countPpp mux subframe count integer No ppp mux subframe count Following example enables redundancy mode Global configurationInvoked y-cable mode RedundancyShow ip rtp header-compression type number detail Show ip rtp header-compression1describes the significant fields shown in the display Field DescriptionThat can exist on an interface Interface interface Show ppp mux2describes the significant fields shown in the display Ppp mux Enables PPP multiplexing/demultiplexingShow redundancy This command has no attributesInvokes redundancy mode Invokes y-cable modeStand-alone configuration StandbyCable configuration Syntax Description DefaultsStandalone No standaloneStandby use-interface interface health revertive backhaul Standby use-interfaceStandby use-interface loopback102 revertive Page Cisco IOS About Command modes Enable mode IP addressCounters, PPP multiplexing IN-2 MIB support Mode y-cableConfiguring CommandIN-4