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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter25 Configuring MLPPP
Configuring MLPPP Backhaul
DETAILED STEPS
Configuring PFC and ACFC
Protocol-Field-Compression (PFC) and Address-and-Control-Field-Compression (AFC) are PPP
compression methods defined in RFCs 1661 and 1662. PFC allows for compression of the PPP Protocol
field; ACFC allows for compression of the PPP Data Link Layer Address and Control fields.
Follow these steps to configure PFC and ACFC handling during PPP negotiation to be configured. By
default, PFC/ACFC handling is not enabled.
Note The recommended PFC and ACFC handling in the Cisco ASR 901 router is: acfc local request, acfc
remote apply, pfc local request, and pfc remote apply.
Configuring PFC
Complete the following steps to configure PFC handling during PPP negotiation:
SUMMARY STEPS
1. enable
2. configure terminal
Command Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
configure terminal
Example:
Router# configure terminal
Enters global configuration mode.
Step 3
interface multilink
multilink-bundle-number
Example:
Router(config)# interface multilink
1
Creates a multilink bundle and enters the multilink interface configuration
mode to configure the multilink bundle.
• multilink-bundle-number—Number of the multilink bundle. The
range is from 1 to 65535.
Step 4
ppp multilink mrru local
bytes
Example:
Router(config-if)# ppp multilink
mrru local 1536
Configures the MRRU value negotiated on a Multilink PPP bundle.
• local—Configures the local MRRU value.
• bytes—MRRU value, in bytes. Valid value range is 128 to 16384.
Step 5
exit
Example:
Router(config)# exit
Exits configuration mode.