Netgear XCM8806 - 8800 SERIES 6-SLOT CHASSIS SWITCH 사용자 설명서

, the switch accepts all tagged (C-tag) and untagged VLAN frames on vMAN 

access ports 1.1 and 1.2. The switch then adds the S-tag to the frames and switches the 
frames to network ports 2.1 and 2.2. When the 802.1ad frames reach the PB egress port, the 
egress switch removes the S-tag, and the VLAN traffic exits the egress access port in its 
original form.

When the switch in 

 acts as the egress switch for a vMAN, vMAN frames arrive on 

network ports 2.1 and 2.2. The switch accepts only those frames with the correct S-tag, 
removes the S-tags, and switches those frames to access ports 1.1 and 1.2. Unless special 
configuration options are applied, the egress frames are identical to ingress frames of the 
vMAN. (Configuration options are described in 

 shows that the S-tags and C-tags used in vMAN frames contain more than just 

customer and service VLAN tags.

Each S-tag and C-tag contains an ethertype, a Class of Service (COS), and a VLAN ID. The 
ethertype is described in 

on page 783, and the COS is 

described in 

on page 784. The service VLAN ID (SVID) is the VLAN tag you 

assign to a vMAN when you create it (

configure vman <vman-name> tag <tag>)

. The 

customer VLAN ID (CVID) represents the customer VLAN tag for tagged VLAN traffic.

The service provider configures the vMAN to support the customer traffic. The vMAN service 
provider does not need to know anything about the VLAN traffic in the vMAN. The service 
provider simply manages the vMAN, and the ingress VLAN traffic is managed by the 
customer or another service provider. This separation of VLAN and vMAN management 
reduces the dependence of the separate management teams on each other, and allows both 
management teams to make changes independent of the other. 

vMAN Configuration Options and Features

This section describes the following vMAN (PBN) configuration options and features:

EX_vman_0036