Cisco Systems 3600 manual Configure Multilink PPP with Interleaving, Step Command Purpose

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Configure Multilink PPP with Interleaving

Configure Multilink PPP with Interleaving

Multi-class Multilink PPP Interleaving allows large packets to be multilink-encapsulated and fragmented into smaller packets to satisfy the delay requirements of real-time voice traffic; small real-time packets, which are not multilink-encapsulated, are transmitted between fragments of the large packets. The interleaving feature also provides a special transmit queue for the smaller, delay-sensitive packets, enabling them to be transmitted earlier than other flows. Interleaving provides the delay bounds for delay-sensitive voice packets on a slow link that is used for other best-effort traffic.

Note Interleaving applies only to interfaces that can configure a multilink bundle interface. These include virtual templates, dialer interfaces, and Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI) or Primary Rate Interface (PRI) interfaces.

In general, Multilink PPP with interleaving is used in conjunction with weighted fair queuing and RSVP or IP Precedence to ensure voice packet delivery. Use Multilink PPP with interleaving and weighted fair queuing to define how data will be managed; use RSVP or IP Precedence to give priority to voice packets.

You should configure Multilink PPP if the following conditions exist in your network:

Point-to-point connection using PPP Encapsulation

Slow links

Note Multilink PPP should not be used on links greater than 2 Mbps.

Multilink PPP support for interleaving can be configured on virtual templates, dialer interfaces, and ISDN BRI or PRI interfaces. To configure interleaving, you need to complete the following tasks:

Configure the dialer interface or virtual template, as defined in the relevant chapters of the Dial Solutions Configuration Guide.

Configure Multilink PPP and interleaving on the interface or template.

To configure Multilink PPP and interleaving on a configured and operational interface or virtual interface template, use the following commands in interface mode:

Step

Command

Purpose

1

ppp multilink

Enable Multilink PPP.

 

 

 

2

ppp multilink interleave

Enable real-time packet interleaving.

 

 

 

3

ppp multilink fragment-delay milliseconds

Optionally, configure a maximum fragment delay.

 

 

 

4

ip rtp reserve lowest-UDP-port

Reserve a special queue for real-time packet flows

 

range-of-ports [maximum-bandwidth]

to specified destination User Datagram Protocol

 

 

(UDP) ports, allowing real-time traffic to have

higher priority than other flows. This is only applicable if you have not configured RSVP.

Note The ip rtp reserve command can be used instead of configuring RSVP. If you configure RSVP, this command is not required.

Configuring Voice over IP for the Cisco 3600 Series VC-19

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Contents How Voice over IP Processes a Telephone Call Configuring Voice over IP for the Cisco 3600 SeriesList of Terms Prerequisite Tasks Voice over IP Configuration Task List Configure IP Networks for Real-Time Voice Traffic VC-18Voice, Video, and Home Applications Configuration Guide Step Command Purpose Configure Multilink PPP with InterleavingMultilink PPP Configuration Example Configure RTP Header CompressionRTP Header Compression Configuration Example Enable RTP Header Compression on a Serial InterfaceChange the Number of Header Compression Connections Configure Custom Queuing Configure Frame Relay for Voice over IPConfigure Weighted Fair Queuing Frame Relay for Voice over IP Configuration Example Create a Number Expansion Table Configure Number ExpansionShows the number expansion table for this scenario Configure Number ExpansionInbound versus Outbound Dial Peers Configure Dial PeersInbound versus Outbound Dial Peers Codec Create a Peer Configuration TableOutbound Dialing on Pots Peers Configure Pots PeersDirect Inward Dial for Pots Peers Incoming and Outgoing Pots Call Legs Configure VoIP Peers Validation Tips Optimize Dial Peer and Network Interface ConfigurationsConfigure IP Precedence for Dial Peers Troubleshooting TipsConfigure Rsvp for Dial Peers Configure Codec for a VoIP Dial Peer Configure Codec and VAD for Dial PeersConfigure VAD for a VoIP Dial Peer Configure Voice over IP using a Trunk ConnectionVC-36Voice, Video, and Home Applications Configuration Guide Configure a Trunk Connection Configure Voice over IP for Microsoft NetMeetingFXS-to-FXS Connection Using Rsvp Voice over IP Configuration ExamplesFXS-to-FXS Connection Example Configuration for Router RLB-1VC-40Voice, Video, and Home Applications Configuration Guide Configuration for Router R12-e Configuration for Router RLB-wConfiguration for Router RLB-2 Linking PBX Users with E&M Trunk Lines Configuration for Router SJConfiguration for Router SLC Pstn Gateway Access Using FXO Connection Example Pstn Gateway Access Using FXO ConnectionPstn Gateway Access Using FXO Connection Plar Mode Pstn Gateway Access Using FXO Connection Plar ModeConfiguring Voice over IP for the Cisco 3600 Series VC-47 VC-48Voice, Video, and Home Applications Configuration Guide
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3600 specifications

Cisco Systems 3600 is a high-performance modular router series designed for small to medium-sized enterprises and branch offices. Launched in the late 1990s, it has been widely recognized for its flexibility, scalability, and reliability. The series is part of Cisco's extensive networking portfolio and has played a vital role in delivering various services and applications while enhancing operational efficiency.

One of the main features of the Cisco 3600 series is its modular architecture, allowing organizations to customize the router according to their specific needs. The system supports various interface modules that can accommodate different types of connections, including serial, Ethernet, and DSL, which helps in building versatile network solutions. The modularity not only increases the router’s lifespan by enabling upgrades as technology changes but also supports future expansion as the organization grows.

The Cisco 3600 series routers utilize advanced routing protocols, such as RIP, OSPF, EIGRP, BGP, and IS-IS, to ensure efficient data transmission and optimal network performance. This capability allows the routers to adapt to varying traffic demands and complexities, thereby optimizing bandwidth utilization and reducing latency in communications. With extensive memory options, including Flash and DRAM, the 3600 series can handle robust data processing and support intricate routing environments.

Security is another critical feature of the Cisco 3600 series. It includes support for VPNs, firewalls, and other security protocols, providing a secure environment for data transfer. The implementation of features like Access Control Lists (ACLs) and Intrusion Detection Systems (IDS) enhances the overall security posture, making it suitable for organizations looking to protect their sensitive information.

In terms of scalability, Cisco 3600 routers can easily accommodate increased workloads and network growth. This is done through the provision of additional modules and cards to increase capacity and performance. The series can also support multiple WAN connections, enabling seamless integration with various telecommunication services.

Additionally, the Cisco 3600 series is designed for ease of management. Utilizing Cisco's IOS software, network administrators can manage and configure the routers efficiently, thanks to a user-friendly interface and extensive command capabilities. This makes troubleshooting simpler and ensures network availability remains high.

In conclusion, Cisco Systems 3600 series routers combine robust performance, security features, and scalability, making them an invaluable asset for businesses looking to maintain a reliable and efficient networking solution.