Figure 19: Multiple Vlans Within A Single D-Pvlan Over Multiple Rings - GE JungleMUX SONET Technical Practice

Table of Contents

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.

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.

combination of these examples.

102

101

JungleMUX Ring 1

JMUX Ring 1

102

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.