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NE40E-M2 V800R010C10SPC500 Feature Description - LAN Access and MAN Access 01

This is NE40E-M2 V800R010C10SPC500 Feature Description - LAN Access and MAN Access
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DHCP Server on a Termination Sub-interface

DHCP Server on a Termination Sub-interface

On the network shown in Figure 7-13 and Figure 7-14, the Dynamic Host Configuration Protocol (DHCP) server function is configured on termination sub-interfaces, so that the sub-interfaces can assign IP addresses to users.

The DHCP server function can be configured on a sub-interface for Dot1q VLAN tag termination or sub-interface for QinQ VLAN tag termination, based on whether the user packets received by a PE contain one or two VLAN tags.

  • If the user packets contain one tag, the sub-interface that has the DHCP server function configured is a sub-interface for Dot1q VLAN tag termination.

  • If the user packets contain double tags, the sub-interface that has the DHCP server function configured is a sub-interface for QinQ VLAN tag termination.

DHCP Server on a Sub-interface for Dot1q VLAN Tag Termination

Figure 7-13 DHCP server on a sub-interface for Dot1q VLAN tag termination

On the network shown in Figure 7-13, the user packet received by the DHCP server carries a single tag. To enable the sub-interface for Dot1q VLAN tag termination on the DHCP server to assign an IP address to a DHCP client, configure the DHCP server function on the sub-interface for Dot1q VLAN tag termination.

DHCP Server on a Sub-interface for QinQ VLAN Tag Termination

Figure 7-14 DHCP server on a sub-interface for QinQ VLAN tag termination

On the network shown in Figure 7-14, the switch has selective QinQ configured, and the user packet received by the DHCP server carries double tags. To enable the sub-interface for QinQ VLAN tag termination on the DHCP server to assign an IP address to a DHCP client, configure the DHCP server function on the sub-interface for QinQ VLAN tag termination.

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Updated: 2019-01-02

Document ID: EDOC1100058405

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