Lucent Technologies P550 Bedienungsanleitung Seite 42

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Overview of the P220 Gigabit Switch Family
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6
Cajun P550/P220 Switch Operation Guide
Figure 2-2. Tagging Schemes
OpenTrunk technology has the following features:
Switch supports frame encapsulation:
Identifies frame VLAN via tag
Associates frame priority
Switch supports multiple tagging formats:
IEEE pre-standard format based on 802.1Q draft document
A major vendor’s multi-layer tagging scheme
3Com® VLAN Tag and PACE priority signalling
Switch supports translation to and from any format. A packet can enter the switch
with a 3Com SuperStack II VLAN tag and exit the switch as a multi-layer tagged
packet (Figure 2-3).
3Com LinkSwitch
3Com LinkSwitch
Multilayer
Multilayer
IEEE 802.1Q
IEEE 802.1Q
OpenTrunk translates VLAN-tagged
frames from one format to another,
including CoS
P220FE
P220G
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