342-86400-498PS
Issue 1.2
April 2012
Page 32
Copyright
GE Multilin Inc. 2010-2012
Q-Trunk Ports
Each Q-Trunk (QT) port has a single D-PVLAN membership and (usually)
multiple QVLAN memberships (the Default QVLAN ID plus up to 49 other ones,
all user configurable). These ports can
exchange traffic only with remote QA and
QT ports (with matching D-PVLAN and QVLAN memberships).
Ingress of untagged frames is normally disabled, but can be enabled by the user.
If enabled, the port‟s Default QVLAN ID (configurable for a value between 1
(default) and 4000) is assigned to ingressing untagged frames.
Ingress of tagged frames is always enabled (cannot be disabled). Only those
ingressing tagged frames whose (outer) VID is matching the Default QVLAN ID
or any of the entered QVLAN memberships will be processed.
Only the frames matching the port‟s D-PVLAN and any of the QVLAN
memberships are allowed to egress. For each QVLAN membership
independently, the port can be set to either add a tag with respective remote
Default QVLAN ID to all egressing untagged frames (the
“Tag” option) or to keep
the egressing frames unchanged with respect to their far-end ingress (the
“No
Change” option). For Default QVLAN only, the port can be alternatively set to
remove the (outer) tag of all egressing tagged frames (the
“Untag” option).
Examples of applications that can be addressed with QT (and QA) ports are
shown in Figures 19 to 23.
17
The actual field implementation may be a
combination of these examples.
JMUX Ring 1
JungleMUX Ring 1
QA
QA
QA
1
1
1
QA
QA
1
1
101
102
102
102
102
QA
1
101
INGRESS
Default QVLAN ID=102
EGRESS
Output Tagging:
- Untag (pop) if drop device is "native".
- Tag (push) if drop device is
“Dot1Q”.
-
„No Change‟ can be used as an alternative to 'Tag' if only
tagged frames appear on all ports.
JMUX Ring 1
JungleMUX Ring 2
QT
QA
QA
QA
QA
QA
1
1
1
1
1
1
1
101
102
101
101
101
101
102
101
102
QA
1
102
QT
QVLAN Memberships = 101,102
Output Tagging: Tag
(
„No Change‟ is an alternative only if
tagged frames appear on all ports.)
D-PVLAN membership
QVLAN membership
Figure 19:
Multiple VLANs within a single D-PVLAN over multiple rings
17
If duplicate MACs are not used anywhere in the network, the applications shown in Figures 19,
20, 21 and 23 are also supported by ETHER-1000 V2. The applications shown in Figures 19 and
20 are also supported by ETHER-1000 V1 if only tagged frames appear on all ports (assuming
use of non-Default QVLAN ID).