Enterasys Networks VH-8G-L3 - Manual (Page 26)

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primary link. Once the Spanning Tree Protocol is configured
and enabled, primary links are established and duplicated
links are blocked automatically. The reactivation of the
blocked links (at the time of a primary link failure) is also
accomplished automatically – without operator intervention.
Port Trunking
Port trunking is used to combine a number of ports together
to make a single high-bandwidth data pipeline. The
participating ports are called members of a port trunking
group, with one port designated as the master port of the
group. Since all members of the port trunking group must be
configured to operate in the same manner, the configuration
of the master port is applied to all members of the port
trunking group. Thus, when configuring the ports in a port
trunking group, you only need to configure the master port.
The VH-8G-L3 supports 4 port trunking groups, which may
include from 2 to 8 switch ports each.
IEEE 802.1Q VLANs
IEEE 802.1Q (tagged) VLANs are implemented on the
VH-8G-L3. 802.1Q VLANs allow tagging, which enables
them to span the entire network (assuming all switches on
the network are IEEE 802.1Q-compliant). IEEE 802.1Q
VLANs also allow for dynamic VLAN registration using
GVRP.
VLANs allow a network to be segmented in order to reduce
the size of broadcast domains. All packets entering a VLAN
will only be forwarded to the stations (over IEEE 802.1Q
enabled switches) that are members of that VLAN, and this
includes broadcast, multicast and unicast packets from
unknown sources.
VLANs can also provide a level of security to your network.
IEEE 802.1Q VLANs will only deliver packets between
stations that are members of the VLAN.
Broadcast Storm Control