Netgear XCM8806 - 8800 SERIES 6-SLOT CHASSIS SWITCH ユーザーズマニュアル

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Chapter 30.  vMAN (PBN)
8800 Chassis Switch 
Note:  
IGMP reports can be received untagged on ports 2:1, 2:2, and 2:3. 
Tagged IP multicast data is received on mc_vlan port 1:1 and is 
routed using IP multicasting to vman1 ports that subscribe to the 
IGMP group.
Note:  
IGMP snooping (Layer 2 IP multicasting forwarding) does not work 
on the vMAN ports because there is no double-tagged IP multicast 
cache lookup capability from port 1:1.
Multiple vMAN Ethertype Example
 shows a switch that is configured to support the primary ethertype on three ports 
and the secondary ethertype on a fourth port. The primary vMAN (PBN) ethertype is changed 
from the default value, but that is not required.
Figure 100. Multiple vMAN Ethertype Example
The following configuration commands accomplish what is shown in 
:
# configure vman ethertype 0x9100 primary
# configure vman ethertype 0x8100 secondary
#
# configure port 2:2 ethertype secondary
# create vman vman300
1.1
1.2
2.1
2.2
vMAN300
Untag
Tag
Tag
Tag
Ethertype  0x9100
Ethertype  0x9100
EX_vman_003
Ethertype  0x9100
Ethertype  0x8100