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ZT8101 User’s Manual 31
Switch Management and Operating Concepts
• Load balancing is automatically applied to the links in the aggregation group, and a link failure
within the group causes the network traffic to be directed to the remaining links in the group.
• Switches that use a load-balancing scheme that sends the packets of a host-to-host data stream
over multiple ports cannot have a trunk connection with the ZT8101 switch.
• Enable the group prior to connecting any cable between the switches to avoid creating a data
loop. Disconnect all link aggregation cables or disable the ports before removing a link
aggregation group to avoid creating a data loop.
VLANs
VLANs allow you to group some physical ports as if they were on the same LAN. VLAN can be
created either statically or dynamically.
• Static VLAN—Ports are assigned to a specific VLAN.
• Dynamic VLAN—Using GVRP (GARP VLAN Registration Protocol), ports are allowed to
dynamically join a VLAN group.
VLANs reduce traffic because traffic between VLANs is restricted. Bridges forward unicast,
multicast, and broadcast traffic only on LAN segments that serve the VLAN to which the traffic
belongs.
For static VLAN configuration, the switch supports two kinds of VLANs:
• Static port—Uses untagged frames.
• Static IEEE 802.1Q VLAN—Uses tagged or untagged frames. Ports that use tagged frames
can belong to more than one VLAN.
By default, all ports belong to a special VLAN called “default.” This default VLAN is a static
IEEE802.1Q VLAN, which has the following unique characteristics:
• The name and the type fields are read-only.
• It cannot be deleted.
• It can contain no VLAN members.
• Its VID is 1, which cannot be changed.
All user-configured VLANs have the following characteristics:
• The size of VLAN name field is 32 bytes.
• Ingress checking is set to on.
• Up to 32 static VLANs can be configured.
The switch supports a maximum of 255 VLANs (64 static, the rest dynamic).
Static Port-Based VLANs
A port-based VLAN is the easiest type to configure on the switch because you only need to specify
the following:
• VLAN name