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

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:

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:

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