METRObility Optical Systems R821-1S, Инструкция по установке и эксплуатации

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Management
2. Enable Q-in-Q operation using the set qinq command.
3. Specify the port VLAN identifier using the set pvid command, if you
want to use a number other than the default PVID value of 1. This
command also allows you to change the access port to Port 2.
802.1Q VLAN Tagging
1. Specify 802.1Q mode using the set switch command.
2. Specify the port VLAN identifier using the set pvid command, if you
want to use a number other than the default PVID value of 1. This
command also allows you to change the access port to Port 2.
3. Configure the user VLANs using the set uservlan command. This
command also allows untagging on the access port on a per-VLAN
basis.
Management Frames
The bridge forwarding mode does not affect the processing of IEEE
802.3ah OAM management frames. They are always delivered to, and
processed by, the R821’s CPU. DSCP and p-bit elements do not apply to
OAM frames, however, the receiver port’s queuing priority is used to
perform internal queuing. OAM frames are never tagged.
If the management channel is untagged, IP-based management frames
must also be untagged. If a management frame is received with DSCP
elements, those elements will be used for internal prioritization towards
the R821’s CPU. If management is disabled on a port, IP-based
management frames received at that port will be discarded.
If the management channel is VLAN-tagged, IP-based management
frames must be tagged with the configured management VLAN. If a
VLAN-tagged management frame is received with DSCP elements, the
elements will be used for internal prioritization towards the R821’s CPU.
If management is disabled on a port, VLAN-tagged management frames
received at that port will be discarded.
For information about how management frames are processed in Q-in-Q
mode, refer to “Management Frames in Q-in-Q Mode” on page 46.