Specifications

Cisco 1751 Router Software Configuration Guide

OL-1070-01

• Links slower than 2 Mbps

Note Do not use multilink PPP 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 for Cisco IOS Release 12.1T.

• 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 interface configuration commands:

Note You can use the ip rtp reserve command instead of configuring RSVP. If you configure

RSVP, this command is not required.

For more information about multilink PPP, refer to the “Configuring Media-Independent PPP and

Multilink PPP” chapter in the Dial Solutions Configuration Guide for Cisco IOS Release 12.1T.

Multilink PPP Configuration Example

The following example defines a virtual interface template that enables multilink PPP with interleaving

and a maximum real-time traffic delay of 20 milliseconds and then applies that virtual template to the

multilink PPP bundle:

Router(config)# interface virtual-template 1

Router(config-if)# ppp multilink

Router(config-if)# encapsulated ppp

Router(config-if)# ppp multilink interleave

Router(config-if)# ppp multilink fragment-delay 20

Router(config-if)# ip rtp reserve 16384 100 64

Router(config)# multilink virtual-template 1

Step Command Task

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 of 20 milliseconds.

4. ip rtp reserve lowest-UDP-port

range-of-ports [maximum-bandwidth]

Reserve a special queue for real-time

packet flows to specified destination UDP

ports, allowing real-time traffic to have

higher priority than other flows. This only

applies if you have not configured RSVP.