Example for Configuring VRRP Groups to Work in Multi-gateway Load Balancing Mode
In this example, two VRRP groups are configured to work in multi-gateway load balancing mode. Devices in the VRRP groups back up each other and load-balance traffic.
Networking Requirements
VRRP groups working in master/backup mode can be configured on routers to implement gateway redundancy. To reduce the traffic burden on the master router, configure VRRP groups to work in multi-gateway load balancing mode to load-balance uplink traffic.
Figure 1 shows two VRRP groups working in load balancing mode. DeviceD is dual-homed to DeviceA and DeviceB. Some users want to use DeviceA to forward data traffic and DeviceB to provide backup. Other users want to use DeviceB to forward data traffic and DeviceA to provide backup. DeviceA and DeviceB functioning as master devices in different VRRP groups can back up each other and load-balance data traffic.
Interfaces 1 through 3 in this example represent GE 0/1/1, GE 0/1/2, and GE 0/1/8, respectively.
Precautions
The IP address of GE 0/1/8 on DeviceA and IP address of GE 0/1/8 on DeviceB must be configured on the same network segment.
Configuration Roadmap
The configuration roadmap is as follows:
Assign an IP address to each interface on each router and configure a routing protocol to ensure IP reachability.
Create two VRRP groups on gateway routers. DeviceA is configured as the master device in VRRP group 1. DeviceB is configured as the master device in VRRP group 2. They can load-balance traffic.
Data Preparation
To complete the configuration, you need the following data:
IP address of each interface on each Device and Layer 2 transparent transmission on DeviceD
- VRID (1) and virtual IP address (10.1.1.111) for a VRRP group configured on DeviceA and DeviceB
- VRRP priorities: 120 for DeviceA (master); default value 100 for DeviceB (backup) in VRRP group 1
- VRID (2) and virtual IP address (10.1.1.112) for the other VRRP group configured on DeviceA and DeviceB
- VRRP priorities: 120 for DeviceB (master); default value 100 for DeviceA (backup) in VRRP group 2
Procedure
- Assign an IP address to each interface on DeviceA, DeviceB, and DeviceC. Configure OSPF to ensure that these routers can communicate with each other. For details about DeviceD configurations, see Configuration Files in this section.
# Configure DeviceA.
<HUAWEI> system-view [~HUAWEI] sysname DeviceA [*HUAWEI] commit [~DeviceA] interface gigabitethernet 0/1/8 [~DeviceA-GigabitEthernet0/1/8] undo shutdown [*DeviceA-GigabitEthernet0/1/8] ip address 10.1.1.1 24 [*DeviceA-GigabitEthernet0/1/8] commit [~DeviceA-GigabitEthernet0/1/8] quit [~DeviceA] interface gigabitethernet 0/1/1 [~DeviceA-GigabitEthernet0/1/1] undo shutdown [*DeviceA-GigabitEthernet0/1/1] ip address 192.168.1.1 24 [*DeviceA-GigabitEthernet0/1/1] commit [~DeviceA-GigabitEthernet0/1/1] quit [~DeviceA] ospf 1 [*DeviceA-ospf-1] area 0 [*DeviceA-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255 [*DeviceA-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.0.255 [*DeviceA-ospf-1-area-0.0.0.0] commit [~DeviceA-ospf-1-area-0.0.0.0] quit [~DeviceA-ospf-1] quit
# Configure DeviceB.
<HUAWEI> system-view [~HUAWEI] sysname DeviceB [*HUAWEI] commit [~DeviceB] interface gigabitethernet 0/1/8 [~DeviceB-GigabitEthernet0/1/8] undo shutdown [*DeviceB-GigabitEthernet0/1/8] ip address 10.1.1.2 24 [*DeviceB-GigabitEthernet0/1/8] commit [~DeviceB-GigabitEthernet0/1/8] quit [~DeviceB] interface gigabitethernet 0/1/2 [~DeviceB-GigabitEthernet0/1/2] undo shutdown [*DeviceB-GigabitEthernet0/1/2] ip address 192.168.2.1 24 [*DeviceB-GigabitEthernet0/1/2] commit [~DeviceB-GigabitEthernet0/1/2] quit [~DeviceB] ospf 1 [*DeviceB-ospf-1] area 0 [*DeviceB-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255 [*DeviceB-ospf-1-area-0.0.0.0] network 192.168.2.0 0.0.0.255 [*DeviceB-ospf-1-area-0.0.0.0] commit [~DeviceB-ospf-1-area-0.0.0.0] quit [~DeviceB-ospf-1] quit
# Configure DeviceC.
<HUAWEI> system-view [~HUAWEI] sysname DeviceC [*HUAWEI] commit [~DeviceC] interface gigabitethernet 0/1/1 [~DeviceC-GigabitEthernet0/1/1] undo shutdown [*DeviceC-GigabitEthernet0/1/1] ip address 192.168.1.2 24 [*DeviceC-GigabitEthernet0/1/1] commit [~DeviceC-GigabitEthernet0/1/1] quit [~DeviceC] interface gigabitethernet 0/1/2 [~DeviceC-GigabitEthernet0/1/2] undo shutdown [*DeviceC-GigabitEthernet0/1/2] ip address 192.168.2.2 24 [*DeviceC-GigabitEthernet0/1/2] commit [~DeviceC-GigabitEthernet0/1/2] quit [~DeviceC] interface gigabitethernet 0/1/8 [~DeviceC-GigabitEthernet0/1/8] undo shutdown [*DeviceC-GigabitEthernet0/1/8] ip address 172.16.1.1 24 [*DeviceC-GigabitEthernet0/1/8] commit [~DeviceC-GigabitEthernet0/1/8] quit [~DeviceC] ospf 1 [*DeviceC-ospf-1] area 0 [*DeviceC-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.0.255 [*DeviceC-ospf-1-area-0.0.0.0] network 192.168.2.0 0.0.0.255 [*DeviceC-ospf-1-area-0.0.0.0] network 172.16.1.0 0.0.0.255 [*DeviceC-ospf-1-area-0.0.0.0] commit [~DeviceC-ospf-1-area-0.0.0.0] quit [~DeviceC-ospf-1] quit
- Create VRRP groups.
# Create VRRP groups 1 and 2 on DeviceA's GE 0/1/8. Set DeviceA's priority to 120 in VRRP group 1 so that it functions as the master, and use the default priority (100) for DeviceA in VRRP group 2 so that it functions as the backup.
<DeviceA> system-view [~DeviceA] interface gigabitethernet 0/1/8 [~DeviceA-GigabitEthernet0/1/8] vrrp vrid 1 virtual-ip 10.1.1.111 [*DeviceA-GigabitEthernet0/1/8] vrrp vrid 1 priority 120 [*DeviceA-GigabitEthernet0/1/8] vrrp vrid 2 virtual-ip 10.1.1.112 [*DeviceA-GigabitEthernet0/1/8] commit [~DeviceA-GigabitEthernet0/1/8] quit
# Create VRRP groups 1 and 2 on DeviceB's GE 0/1/8. Use the default priority (100) for DeviceB in VRRP group 1 so that it functions as the backup, and set the priority to 120 for DeviceB in VRRP group 2 so that it functions as the master.
<DeviceB> system-view [~DeviceB] interface gigabitethernet 0/1/8 [~DeviceB-GigabitEthernet0/1/8] vrrp vrid 1 virtual-ip 10.1.1.111 [*DeviceB-GigabitEthernet0/1/8] vrrp vrid 2 virtual-ip 10.1.1.112 [*DeviceB-GigabitEthernet0/1/8] vrrp vrid 2 priority 120 [*DeviceB-GigabitEthernet0/1/8] commit [~DeviceB-GigabitEthernet0/1/8] quit
- Verify the configuration.
Run the display vrrp command on DeviceA. The command output shows that DeviceA serves as the master device in VRRP group 1 and as a backup device in VRRP group 2.
<DeviceA> display vrrp GigabitEthernet0/1/8 | Virtual Router 1 State : Master Virtual IP : 10.1.1.111 Master IP : 10.1.1.1 Local IP : 10.1.1.1 PriorityRun : 120 PriorityConfig : 120 MasterPriority : 120 Preempt : YES Delay Time : 0s Hold Multiplier : 4 TimerRun : 1s TimerConfig : 1s Auth Type : None Virtual MAC : 00e0-fc12-7890 Check TTL : YES Config Type : normal-vrrp Backup-forward : disabled Create Time : 2011-12-29 05:41:23 Last Change Time : 2011-12-29 05:41:33 GigabitEthernet0/1/8 | Virtual Router 2 State : Backup Virtual IP : 10.1.1.112 Master IP : 10.1.1.2 Local IP : 10.1.1.1 PriorityRun : 100 PriorityConfig : 100 MasterPriority : 120 Preempt : YES Delay Time : 0s Hold Multiplier : 4 TimerRun : 1s TimerConfig : 1s Auth Type : None Virtual MAC : 00e0-fc12-7880 Check TTL : YES Config Type : normal-vrrp Backup-forward : disabled Create Time : 2011-12-29 05:41:23 Last Change Time : 2011-12-29 05:41:33
Run the display vrrp command on DeviceB. The command output shows that DeviceB serves as a backup device in VRRP group 1 and as the master device in VRRP group 2.
<DeviceB> display vrrp GigabitEthernet0/1/8 | Virtual Router 1 State : Backup Virtual IP : 10.1.1.111 Master IP : 10.1.1.1 Local IP : 10.1.1.2 PriorityRun : 100 PriorityConfig : 100 MasterPriority : 120 Preempt : YES Delay Time : 0s Hold Multiplier : 4 TimerRun : 1s TimerConfig : 1s Auth Type : None Virtual MAC : 00e0-fc12-7890 Check TTL : YES Config Type : normal-vrrp Backup-forward : disabled Create Time : 2011-12-29 05:41:23 Last Change Time : 2011-12-29 05:41:33 GigabitEthernet0/1/8 | Virtual Router 2 State : Master Virtual IP : 10.1.1.112 Master IP : 10.1.1.2 Local IP : 10.1.1.2 PriorityRun : 120 PriorityConfig : 120 MasterPriority : 120 Preempt : YES Delay Time : 0s Hold Multiplier : 4 TimerRun : 1s TimerConfig : 1s Auth Type : None Virtual MAC : 00e0-fc12-7880 Check TTL : YES Config Type : normal-vrrp Backup-forward : disabled Create Time : 2011-12-29 05:41:23 Last Change Time : 2011-12-29 05:41:33
Configuration Files
DeviceA configuration file
# sysname DeviceA # interface GigabitEthernet0/1/1 undo shutdown ip address 192.168.1.1 255.255.255.0 # interface GigabitEthernet0/1/8 undo shutdown ip address 10.1.1.1 255.255.255.0 vrrp vrid 1 virtual-ip 10.1.1.111 vrrp vrid 1 priority 120 vrrp vrid 2 virtual-ip 10.1.1.112 # ospf 1 area 0.0.0.0 network 192.168.1.0 0.0.0.255 network 10.1.1.0 0.0.0.255 # return
DeviceB configuration file
# sysname DeviceB # interface GigabitEthernet0/1/2 undo shutdown ip address 192.168.2.1 255.255.255.0 # interface GigabitEthernet0/1/8 undo shutdown ip address 10.1.1.2 255.255.255.0 vrrp vrid 1 virtual-ip 10.1.1.111 vrrp vrid 2 virtual-ip 10.1.1.112 vrrp vrid 2 priority 120 # ospf 1 area 0.0.0.0 network 192.168.2.0 0.0.0.255 network 10.1.1.0 0.0.0.255 # return
DeviceC configuration file
# sysname DeviceC # interface GigabitEthernet0/1/1 undo shutdown ip address 192.168.1.2 255.255.255.0 # interface GigabitEthernet0/1/2 undo shutdown ip address 192.168.2.2 255.255.255.0 # interface GigabitEthernet0/1/8 undo shutdown ip address 172.16.1.1 255.255.255.0 # ospf 1 area 0.0.0.0 network 192.168.1.0 0.0.0.255 network 192.168.2.0 0.0.0.255 network 172.16.1.0 0.0.0.255 # return
DeviceD configuration file
# sysname DeviceD # vlan batch 10 # interface Vlanif10 ip address 10.1.1.110 255.255.255.0 # interface GigabitEthernet0/1/1 undo shutdown port default vlan 10 # interface GigabitEthernet0/1/2 undo shutdown port default vlan 10 # return