ZXR10 5900E Product Description

ZXR10 5900E Product Description

VLAN. When the port receives a VLAN attribute reclaim announcement, it cancels the

VLAN information contained in the announcement and the port quit the VLAN. The port will not join the dynamic VLAN without receiving VLAN registration information. In this way it realizes VLAN cutting and suppress the unnecessary traffic.

3.1.12 PPPoE+

PPPoE+ is also called PPPoE Intermediate Agent. Its implementation principles are similar to that of DHCP option82. It expands PPPoE packets. Working as the intermediate agent, the switch intercepts the protocol packets at PPPoE Discovery Stage.

It inserts TAG containing port information into payload of the packet for the server to identify the user port. Some BRAS will also inset TAG in response to the downlinking packet. Therefore, as the intermediate agent, the switch will delete the TAG in the downlinking packet. PPPoE+ processing procedure is shown in the following figure:

Figure 3-2 Processing procedure of PPPoE+

PPPoE

Host

PPPoE

Agent

Access

Concentrator

PADI

PADI + uPortID

PADO

PADR

PADR + uPortID

PADS

PPP Session Stage

PADT PADT

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