3 priority queue, 1 strictly priority – ZyXEL Communications 1 User Manual
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NetAtlas Enterprise 1.00 User’s Guide
Chapter 11 Switch Configuration
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11.3 Priority Queue
Queuing is used to help solve performance degradation when there is network congestion. Use
the Queue Method screen to configure queuing algorithms for outgoing traffic.
Queuing algorithms allow switches to maintain separate queues for packets from each
individual source or flow and prevent a source from monopolizing the bandwidth.
11.3.1 Strictly Priority
Strictly Priority (SP) services queues based on priority only. As traffic comes into the switch,
traffic on the highest priority queue, Q7 is transmitted first. When that queue empties, traffic
on the next highest-priority queue, Q6 is transmitted until Q6 empties, and then traffic is
transmitted on Q5 and so on. If higher priority queues never empty, then traffic on lower
priority queues never gets sent. SP does not automatically adapt to changing network
requirements.
IGMP Snooping
Select the check box to enable IGMP snooping. See
for more information on IGMP snooping.
Bridge control protocol
transparency
Select the check box to allow the switch to handle bridging control
protocols (STP for example). You also need to define how to treat a BPDU
in the Port Setup screen.
Bandwidth control
Select the check box to activate bandwidth control.
Broadcast storm control
Select the check box to activate broadcast storm control.
Mirroring
Select the check box to activate port mirroring.
Monitor Port
The monitor port is the port you copy the traffic to in order to examine it in
more detail without interfering with the traffic flow on the original port(s).
Select a port from this drop-down list box.
802.1x
Select the check box to activate 802.1x authentication.
Port Security
Select the check box to activate port security.
VLAN Stacking SP TPID
SP TPID is a standard Ethernet type code identifying the frame and
indicates whether the frame carries IEEE 802.1Q tag information. Choose
0x8100 or 0x9100 from the drop-down list box or select Others and then
enter a four-digit hexadecimal number from 0x0000 to 0xFFFF. 0x
denotes a hexadecimal number. It does not have to be typed in the Others
text field.
VLAN Port GVRP
Select the check box to permit VLANs groups beyond the local switch on
this port. GVRP (GARP VLAN Registration Protocol) is a registration
protocol that defines a way for switches to register necessary VLAN
members on ports across the network.
Port Isolation
Port Isolation allows each port to communicate with the CPU port, uplink
ports and stacking ports but not communicate with each other. This option
is the most limiting but also the most secure.
DHCP Relay
Select the check box to enable DHCP relay.
Apply
Click Apply to save your changes back to the switch.
Table 31 Configuration: Switch Configuration: Switch Setup (continued)
LABEL
DESCRIPTION