Allen-Bradley armorstratix 5700, User Manual, Page: 281 / 458

Rockwell Automation Publication 1783-UM007I-EN-P - December 2017 281
Configure Switch Features Chapter 3
VLAN 0 Priority Tagging and Priority Values
When VLAN 0 priority tagging is configured on the interface, the 802.1P
priority bits are retained on ingress for the VLAN 0 tagged Ethernet frames. To
retain the 802.1P priority bits of the VLAN 0 Ethernet packets on egress, the
egress interface must be in trunk mode, and the native VLAN should not be
the same native VLAN as the ingress interface. When these frames are received
at the destination, the header is stripped off and the frame is processed as per
the configuration of the 802.1P priority bits. If the VLAN ID has a nonzero
value, the header is retained and the frame is transmitted to the specified
VLAN. High priority frames are sent ahead of low priority frames.
Configure VLAN 0 Priority Tagging
All switches support VLAN 0 priority tagging:
•
In IOS Release 15.2(6)E0a and later, you can enable or disable VLAN 0
on the Edit Physical Port page in Device Manager as described on
page 49 . By default, VLAN 0 is enabled.
•
In IOS Release 15.2(5)EA.fc4 and earlier, you must use the CLI to
enable VLAN 0 priority tagging. By default, VLAN 0 is disabled.
To configure VLAN 0 tagging for PROFINET traffic via the CLI, see
page 243 .