Example for Configuring Interface-specific UCMP for IP Packet Forwarding

This section provides an example for configuring interface-specific UCMP for IP packet forwarding.

Networking Requirements

As shown in Figure 1, Device A and Device E are connected through three links that pass through Device B, Device C, and Device D, respectively. The bandwidth of the link from Device A to Device B is 1 Gbit/s, that from Device A to Device C is 1 Gbit/s, and that from Device A to Device D is 10 Gbit/s. To allow traffic to be load balanced among these paths, configure UCMP for IP packet forwarding. In this example, configure UCMP on specified interfaces, not on an entire router.

Figure 1 Configuring interface-specific UCMP

The configurations in this example are performed on Device A, Device B, Device C, Device D, and Device E. HUAWEI NetEngine 8000 F Seriess can function as Device A through Device E.


Table 1 Device names, interface names, and IP addresses

Device Name

Interface Name

IP Address

Device A

GE 0/1/24

10.30.1.1/24

GE 0/1/16

10.40.1.1/24

GE 0/1/8

10.50.1.1/24

Device B

GE 0/1/0

10.30.1.2/24

GE 0/1/8

10.60.1.2/24

Device C

GE 0/1/0

10.40.1.2/24

GE 0/1/8

10.70.1.2/24

Device D

GE 0/1/0

10.50.1.2/24

GE 0/1/8

10.80.1.2/24

Device E

GE 0/1/24

10.60.1.1/24

GE 0/1/16

10.70.1.1/24

GE 0/1/8

10.80.1.1/24

Configuration Roadmap

The configuration roadmap is as follows:

  1. Configure an IGP on each router. IS-IS is used in this example.

  2. Enable UCMP on each interface, allowing three paths between Device A and Device E to perform UCMP during IP packet forwarding.

Data Preparation

To complete the configuration, you need the following data:

  • Type and number of each interface

  • IP address of each interface

  • IS-IS area ID and level for each router

Procedure

  1. Assign an IP address to each interface. For configuration details, see Configuration Files in this section.
  2. Configure basic IS-IS functions.

    # Configure Device A.

    [~DeviceA] isis 1
[*DeviceA-isis-1] is-level level-1
[*DeviceA-isis-1] network-entity 10.0000.0000.0001.00
[*DeviceA-isis-1] commit
[~DeviceA-isis-1] quit
[~DeviceA] interface gigabitethernet 0/1/0
[~DeviceA-GigabitEthernet0/1/0] isis enable 1
[*DeviceA-GigabitEthernet0/1/0] quit
[*DeviceA] interface gigabitethernet 0/1/8
[*DeviceA-GigabitEthernet0/1/8] isis enable 1
[*DeviceA-GigabitEthernet0/1/8] quit
[*DeviceA] interface gigabitethernet 0/1/24
[*DeviceA-GigabitEthernet0/1/24] isis enable 1
[*DeviceA-GigabitEthernet0/1/24] quit
[*DeviceA] interface gigabitethernet 0/1/16
[*DeviceA-GigabitEthernet0/1/16] isis enable 1
[*DeviceA-GigabitEthernet0/1/16] quit
[*DeviceA] commit

    # Configure Device B.

    [~DeviceB] isis 1
[*DeviceB-isis-1] is-level level-1
[*DeviceB-isis-1] network-entity 10.0000.0000.0002.00
[*DeviceB-isis-1] commit
[~DeviceB-isis-1] quit
[~DeviceB] interface gigabitethernet 0/1/0
[~DeviceB-GigabitEthernet0/1/0] isis enable 1
[*DeviceB-GigabitEthernet0/1/0] quit
[*DeviceB] interface gigabitethernet 0/1/8
[*DeviceB-GigabitEthernet0/1/8] isis enable 1
[*DeviceB-GigabitEthernet0/1/8] quit
[*DeviceB] commit

    # Configure Device C.

    [~DeviceC] isis 1
[*DeviceC-isis-1] is-level level-1
[*DeviceC-isis-1] network-entity 10.0000.0000.0003.00
[*DeviceC-isis-1] commit
[~DeviceC-isis-1] quit
[~DeviceC] interface gigabitethernet 0/1/0
[~DeviceC-GigabitEthernet0/1/0] isis enable 1
[*DeviceC-GigabitEthernet0/1/0] quit
[*DeviceC] interface gigabitethernet 0/1/8
[*DeviceC-GigabitEthernet0/1/8] isis enable 1
[*DeviceC-GigabitEthernet0/1/8] quit
[*DeviceC] commit

    # Configure Device D.

    [~DeviceD] isis 1
[*DeviceD-isis-1] is-level level-1
[*DeviceD-isis-1] network-entity 10.0000.0000.0004.00
[*DeviceD-isis-1] commit
[~DeviceD-isis-1] quit
[~DeviceD] interface gigabitethernet 0/1/0
[~DeviceD-GigabitEthernet0/1/0] isis enable 1
[*DeviceD-GigabitEthernet0/1/0] quit
[*DeviceD] interface gigabitethernet 0/1/8
[*DeviceD-GigabitEthernet0/1/8] isis enable 1
[*DeviceD-GigabitEthernet0/1/8] quit
[*DeviceD] commit

    # Configure Device E.

    [~DeviceE] isis 1
[*DeviceE-isis-1] is-level level-1
[*DeviceE-isis-1] network-entity 10.0000.0000.0005.00
[*DeviceE-isis-1] commit
[~DeviceE-isis-1] quit
[~DeviceE] interface gigabitethernet 0/1/0
[~DeviceE-GigabitEthernet0/1/0] isis enable 1
[*DeviceE-GigabitEthernet0/1/0] quit
[*DeviceE] interface gigabitethernet 0/1/8
[*DeviceE-GigabitEthernet0/1/8] isis enable 1
[*DeviceE-GigabitEthernet0/1/8] quit
[*DeviceE] interface gigabitethernet 0/1/24
[*DeviceE-GigabitEthernet0/1/24] isis enable 1
[*DeviceE-GigabitEthernet0/1/24] quit
[*DeviceE] interface gigabitethernet 0/1/16
[*DeviceE-GigabitEthernet0/1/16] isis enable 1
[*DeviceE-GigabitEthernet0/1/16] quit
[*DeviceE] commit

  3. Enable UCMP on every outbound interface of Device A.

    [~routerA] interface gigabitethernet 0/1/8
[~routerA-GigabitEthernet0/1/8] load-balance unequal-cost enable
[*routerA-GigabitEthernet0/1/8] quit
[*routerA] interface gigabitethernet 0/1/24
[*routerA-GigabitEthern0/1/24] load-balance unequal-cost enable
[*routerA-GigabitEthern0/1/24] quit
[*routerA] interface gigabitethernet 0/1/16
[*routerA-GigabitEthernet0/1/16] load-balance unequal-cost enable
[*routerA-GigabitEthernet0/1/16] quit
[*routerA] commit

    The traffic tester measures the traffic bandwidth values on GE 0/1/24 (10.30.1.1/24), GE 0/1/16 (10.40.1.1/24), and GE 0/1/8 (10.50.1.1/24) of Device A and obtains the traffic ratio of 1:1:10.

Configuration Files

  • Device A configuration file

    #
 sysname routerA
#
isis 1
 is-level level-1
 network-entity 10.0000.0000.0001.00
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.1.1.1 255.255.255.0
 isis enable 1
#
interface GigabitEthernet0/1/8
 undo shutdown
 load-balance unequal-cost enable
 ip address 10.50.1.1 255.255.255.0
 isis enable 1
#
interface GigabitEthernet0/1/16
 undo shutdown
 load-balance unequal-cost enable
 ip address 10.40.1.1 255.255.255.0
 isis enable 1
#
interface GigabitEthernet0/1/24
 undo shutdown
 load-balance unequal-cost enable
 ip address 10.30.1.1 255.255.255.0
 isis enable 1
#
return

  • Device B configuration file

    #
 sysname routerB
#
isis 1
 is-level level-1
 network-entity 10.0000.0000.0002.00
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.30.1.2 255.255.255.0
 isis enable 1
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 10.60.1.2 255.255.255.0
 isis enable 1
#
return

  • Device C configuration file

    #
 sysname routerC
#
isis 1
is-level level-1
 network-entity 10.0000.0000.0003.00
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.40.1.2 255.255.255.0
 isis enable 1
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 10.70.1.2 255.255.255.0
 isis enable 1
#
return

  • Device D configuration file

    #
 sysname routerD
#
isis 1
 is-level level-1
 network-entity 10.0000.0000.0004.00
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.50.1.2 255.255.255.0
 isis enable 1
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 10.80.1.2 255.255.255.0
 isis enable 1
#
return

  • Device E configuration file

    #
 sysname routerE
#
isis 1
 is-level level-1
 network-entity 10.0000.0000.0005.00
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.20.1.1 255.255.255.0
 isis enable 1
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 10.80.1.1 255.255.255.0
 isis enable 1
#
interface GigabitEthernet0/1/16
 undo shutdown
 ip address 10.70.1.1 255.255.255.0
 isis enable 1
#
interface GigabitEthernet0/1/24
 undo shutdown
 ip address 10.60.1.1 255.255.255.0
 isis enable 1
#
return
Parent Topic: Load Balancing Configuration Examples
Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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