M2M IDG500AM-0T001 User Manual page 253

M2M Cellular Gateway
Parameter Setup Example
Following tables list the parameter configuration as a group example for the gateways
in above diagram with "VRRP" enabling.
Use default value for those parameters that are not mentioned in the tables.

Master Gateway
Configuration Path
LAN IP Address
Subnet Mask
Configuration Path
VRRP
Virtual Server ID
Priority of Virtual Server
Virtual Server IP Address

Backup Gateway
Configuration Path
LAN IP Address
Subnet Mask
Configuration Path
VRRP
Virtual Server ID
Priority of Virtual Server
Virtual Server IP Address
Scenario Operation Procedure
In above diagram, the Master Gateway and the Backup Gateway are the redundant
gateway group of Network‐A and the subnet of its Intranet is 10.0.75.0/24. The master
gateway has the IP address of 10.0.75.1 for LAN interface, 203.95.80.22 for WAN‐1
interface. However, the backup gateway has the IP address of 10.0.75.2 for LAN
interface, 118.18.81.33 for WAN‐1 interface. They both serve as NAT routers.
Specify the ID of VRRP virtual server to be "253" and its IP address to be "10.0.75.200".
The priority of the master gateway is 254 and it is larger than the one (253) of the
backup gateway.
At first stage, all data from the Intranet go through the master gateway that has the
highest priority.
Once the master Internet connection is broken, the backup gateway will take over the
data transmitting job and serve as the master gateway.
When a gateway with higher priority than current master gateway recovers from its
broken Internet connection, it will be in charge of the data transmitting again.
Index skipping is used to reserve slots for new function insertion, when required.
[Ethernet LAN]‐[Configuration] ([Basic Network]‐[LAN&VLAN])
10.0.75.1
255.255.255.0 (/24)
[VRRP]‐[Configuration]
■ Enable
253
254
10.0.75.200
[Ethernet LAN]‐[Configuration] ([Basic Network]‐[LAN&VLAN])
10.0.75.2
255.255.255.0 (/24)
[VRRP]‐[Configuration]
■ Enable
253
253
10.0.75.200
253