Extreme Networks BlackDiamond 6800 Installation And User Manual page 69

Configuring VLAN Tag Nesting Attributes
The
config dot1q tagnesting
allowing a tag push or pop attribute to be associated with a VLAN ID. The push
attribute indicates that a new tag is to be added to the frame, while the pop attribute
indicates that the top-level tag is to be removed from the frame. The command also
gives you the option to preserve the 802.1p priority of the frame or set it to a configured
value when a new tag is added (pushed) to the frame. VLAN ID (VID) mapping occurs
before a new tag is pushed, and after a nested tag is popped.
To configure the VLAN tag nesting attributes for an ATM port, use the following
command:
config dot1q tagnesting {<vlanid> | <vlanid_range>} [off | pop |
push <new_vlanid> {priority <priority>}] ports <portlist> {egress | ingress}
The
vlanid
parameter is specified in the form
values are both integers in the range from 1 to 4095 and must be separated by a
hyphen.
The
push
specified in
new tag added to frames contains the value specified in
The keyword indicates that the top-level tag is to be removed from frames when
pop
that tag contains either the VID specified in
specified in
If you do not specify a VID or a range of VIDs, the command settings are applied to all
VIDs.
Tag operations can be performed in either the egress direction (to the ATM link) or the
ingress direction (from the ATM link). If you do not specify a direction, the default
behavior is that tag operations are performed in the egress direction. If you do not use
either the
tag pop operation is automatically configured for the ingress direction. If you do not
use either the egress or ingress keyword and tag nesting is disabled using the
keyword, tag nesting is disabled in both directions.
The optional
user-configured value when a new tag is pushed. Using the
command indicates that the 802.1p priority field is to be set to the value specified in
Asynchronous Transfer Mode (ATM) Module Installation and User Guide
parameter is an integer in the range from 1 to 4095. The
keyword indicates that a new tag is to be added to frames containing the VID
or to one of the VIDs in the range specified in
vlanid
.
vlanid_range
or keyword and tag pushing is configured, a corresponding
egress ingress
keyword provides a way to overwrite the 802.1p priority with a
priority
command provides support for 802.1Q tags by
-
start_vlanid end_vlanid
or any one of the VIDs in the range
vlanid
Configuring VLAN-Related Attributes
vlanid_range
, where the start and end
vlanid_range
.
new_vlanid
keyword in the
priority
. The
off
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