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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 25 Configuring MLPPP
Configuring MLPPP Backhaul
DETAILED STEPS
Configuring MRRU
You should configure the local maximum received reconstructed unit (MRRU) of the multilink bundle
to a value greater than or equal to 1508 bytes(or equal to the maximum packet length expected on the
bundle at any point in time). The maximum MTU supported on the Cisco ASR 901 router is 1536, and
MTU drops occur when the packet length is more than 1536.
Complete the following steps to configure MRRU:
SUMMARY STEPS
1. enable
2. configure terminal
3. interface multilink group-number
4. ppp multilink mru local bytes
5. end
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
Router(config)# interface multilink
group-number
Example:
Router(config)# interface
multilink5
Creates a multilink bundle and enters the interface configuration mode:
• group-number—Number of the multilink bundle.
The example creates a multilink bundle 5.
To remove a multilink bundle, use the no form of this command.
Step 4
Router(config-if)# ip address
address [subnet mask]
Example:
Router(config-if)# ip address
10.10.10.2 255.255.255.0
Assigns an IP address to the multilink interface.
• address— IP address.
• subnet mask—Network mask of IP address.
The example configures an IP address and subnet mask.
Step 5
Router(config-if)# exit
Example:
Router(config-if)# exit
Exits configuration mode.