Huawei AR150 series - Configuring the Unequal-Cost Multiple Path During IP Packet Forwarding

7.4.2 Configuring the Unequal-Cost Multiple Path During IP Packet
Forwarding
UCMP load balances traffic among equal-cost links based on bandwidth.
Context
ECMP evenly load balances traffic over multiple equal-cost links, regardless of the bandwidth.
Consequently, traffic congestion may occur on low-speed links and bandwidth of high-speed
links cannot be used efficiently. To load balance traffic on the equal-cost links based on
bandwidth, configure UCMP.
When configuring the UCMP function, manually set the bandwidth of an interface in the
following scenarios:
l Users need to adjust the bandwidth of equal-cost links so that the equal-cost links load
balance traffic based on the configured bandwidth.
l The outbound interface of the equal-cost route is a logical interface.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The interface view is displayed.
NOTE
To configure UCMP on a logical interface, you must perform step 3.
Step 3 (Optional) Run:
load-balance bandwidth bandwidth
The bandwidth is manually configured for the interface.
Step 4 Run:
load-balance unequal-cost enable
UCMP is enabled on the interface.
By default, UCMP is disabled on an interface.
Step 5 Run:
shutdown
The interface is shut down.
Step 6 Run:
undo shutdown
The interface is started.
Step 7 Run:
quit
Huawei AR150&200 Series Enterprise Routers
Configuration Guide - IP Service 7 IP Performance Configuration
Issue 02 (2012-03-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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