Configuring Multilink Interfaces - Cisco MWR 1941-DC User Manual

Cisco MWR 1941-DC Router with the Cisco IOS IP-RAN Feature Set

Configuring Multilink Interfaces

To configure the multilink interfaces, complete the following tasks:
•
•
•
•
•
•
•
Configuring Multilink PPP
As higher-speed services are deployed, Multilink-PPP (MLP) provides a standardized method for
spreading traffic across multiple WAN links, while providing multivendor interoperability and
load-balancing on both inbound and outbound traffic.
A Multilink interface is a special virtual interface which represents a multilink PPP bundle. The
multilink interface serves to coordinate the configuration of the bundled link, and presents a single object
for the aggregate links. However, the individual PPP links that are aggregated together, must also be
configured. Therefore, to enable Multilink PPP on multiple serial interfaces, you need to first set up the
multilink interface, and then configure each of the serial interfaces and add them to the same multilink
interface.
The MWR 1941-DC router can support up to 16 T1 interfaces through the multilink interface.
To set up the multilink interface, use the following commands, beginning in global configuration mode:
Command
Step 1
RPM(config)# interface multilink number
Step 2
RPM(config-if)# ppp multilink
Step 3
RPM(config-if)# multilink-group group-number
or
RPM(config-if)# ppp multilink group group-number
Step 4
RPM(config-if)# ip unnumbered loopback number
1. Cisco IOS Release 12.2(15)MC2a or later.
2. Cisco IOS 12.3(11)T or later.
Configuring Multilink PPP, page 17
Configuring IP Address Assignment, page 18
Configuring PPP Multiplexing, page 18
Configuring RTP/UDP Compression, page 20
Configuring the RTP/UDP Compression Flow Expiration Timeout Duration, page 21
Configuring Routing Protocol Attributes, page 22
Configuring PIM, page 22
Purpose
Specifies the multilink interface to be configured.
Enables multilink PPP operation.
1
Specifies an identification number for the multilink
interface.
2
Enables IP processing on the multilink interface
without assigning an explicit IP address to the
interface, where number is the number of the
loopback interface that you configured in
Configuring Multilink
Configuring Tasks
PPP.
17