How to configure the interconnection between an AR router and a switch

1. In the simplest interconnection configuration, the AR router is configured as the internal gateway, and the switch supports plug-and-play.
a. If the AR router connects to the switch through a Layer-2 interface, you can configure the IP address of the VLANIF interface.
b. If the AR router connects with the switch through a Layer-3 interface, you can configure the IP address of the Layer-3 interface.
2. Configure the AR router and the switch:
a. If the interfaces of the AR router and the switch are all Layer-2 interfaces and interconnect with each other in Layer 2, configure the interfaces of the AR router and the switch as trunk or access interfaces to transparently transmit the data of corresponding VLANs.
b. If the interfaces of the AR router and the switch are all Layer-2 interfaces and interconnect with each other in Layer 3, configure the interfaces as access interfaces, and configure the connected VLANs with IP address in the same network segment.
c. If the interfaces of the AR router and the switch are all Layer-3 interfaces and interconnect with each other in Layer 3, configure the interfaces with IP addresses in the same network segment.
d. When the interfaces of the AR routers are Layer-3 interfaces, if the interfaces of the switch are Layer-2 interfaces configured as access interfaces, configure the VLANIF interfaces of the switch and the interfaces of the AR router with IP addresses in the same network segment. If the interfaces of the switch are Layer-2 interfaces configured as trunk interfaces which can transmit multiple VLANs, configure sub-interfaces for the Layer-3 interfaces of the AR router. (dot1q termination vid�?BR>For details about the configuration, see the following URL: A Layer 2 Switch Is Connected to the AR to Implement Internet Access

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