3Com SuperStack II Manual page 65

You cannot enable security on a port that is part of a resilient link, or a
port that is part of a port trunk. For more information, see
Resilient Links" on page 79
PACE Stack Default / Enabled / Disabled
Allows you to specify whether the port uses PACE (Priority Access Control
Enabled) to support multimedia traffic:
Stack Default — The port takes the PACE setting from the Advanced
Stack Setup page. For more information, see
Advanced Stack Settings"
Enabled — Use this setting if the port is connected to:
A switch, bridge or router that does not support PACE, or has PACE
disabled
An endstation that has PACE enabled
Disabled — Use this setting if the port is connected to:
A hub
A switch, bridge or router that has PACE enabled
An endstation that does not support PACE, or has PACE disabled
VLT Tagging Enabled / Disabled
Allows you specify whether the port uses VLT (Virtual LAN Trunk) tagging.
By specifying that the ports at both ends of a link use VLT tagging, you
can create a VLT tagged link that carries traffic for all of the VLANs
defined on your Switch. For more information about VLT tagging, see
"Placing a Port in Multiple VLANs"
VLT tagging can only be used on links to legacy 3Com devices.
A port cannot use VLT tagging if:
It uses 802.1Q tagging — for more information about 802.1Q
tagging, see "Placing a Port in Multiple VLANs"
It is the main or standby port of a resilient link, and the other port
does not use VLT tagging — for more information about resilient links,
"Setting Up Resilient Links"
see
It belongs to a port trunk — for more information about port trunks,
see "Port Trunks"
You cannot disable VLT tagging if the port is part of a resilient link pair.
Configuring the Current Switch
and "Port Trunks"
on page 76.
on page
page
on
on page 157.
"Setting Up
on page 157.
"Configuring the
166.
on page 166.
79.
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