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S9300, S9300E, and S9300X V200R012C00 Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, VLAN aggregation, MUX VLAN, VLAN termination, Voice VLAN, VLAN mapping, QinQ, GVRP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, HVRP, and Layer 2 protocol transparent transmission.
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Using a VLANIF Interface to Implement Layer 3 Connectivity Between the Switch and Router

Using a VLANIF Interface to Implement Layer 3 Connectivity Between the Switch and Router

To reduce costs, most enterprises use switches to connect internal devices and an egress router to connect to an ISP network, as shown in Figure 4-21.

Figure 4-21  Connection between the switch and router

To access the ISP network, the core Layer 3 switch and egress router need to interwork at Layer 3. Most Layer 3 switches do not support routed interfaces or support a limited number of routed interfaces. Generally, a VLANIF interface is used as a Layer 3 interface to communicate with the Layer 3 sub-interface of the router, and then static route or a dynamic routing protocol is configured to implement Layer 3 connectivity between the core switch and egress router.

Updated: 2019-01-18

Document ID: EDOC1100038290

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