ZyXEL Communications ZyXEL XtremeMIMO X-550 User Manual
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ZyXEL X-550 User’s Guide
have network priority.
Dynamic Fragmentation:
This option should be enabled when you have a slow Internet uplink. It helps to reduce the impact that
large low priority network packets can have on more urgent ones by breaking the large packets into several
smaller packets.
Automatic Uplink Speed:
When enabled, this option causes the router to automatically measure the useful uplink bandwidth each
time the WAN interface is re-established (after a reboot, for example).
Measured Uplink Speed:
This is the uplink speed measured when the WAN interface was last re-established. The value may be
lower than that reported by your ISP as it does not include all of the network protocol overheads associated
with your ISP's network. Typically, this figure will be between 87% and 91% of the stated uplink speed for
xDSL connections and around 5 kbps lower for cable network connections.
Uplink Speed:
If Automatic Uplink Speed is disabled, this options allows you to set the uplink speed manually. Uplink
speed is the speed at which data can be transferred from the router to your ISP. This is determined by your
ISP. ISPs often specify speed as a downlink/uplink pair; for example, 1.5Mbits/284Kbits. For this example,
you would enter "284". Alternatively you can test your uplink speed with a service such as
however that sites such as DSL Reports, because they do not consider as many
network protocol overheads, will generally note speeds slightly lower than the Measured Uplink Speed or
the ISP rated speed.
Connection Type:
By default, the router automatically determines whether the underlying connection is an xDSL/Frame-relay
network or some other connection type (such as cable modem or Ethernet), and it displays the result as
Detected xDSL or Frame Relay Network. If you have an unusual network connection in which you are
actually connected via xDSL but for which you configure either "Static" or "DHCP" in the WAN settings,
setting this option to xDSL or Other Frame Relay Network ensures that the router will recognize that it
needs to shape traffic slightly differently in order to give the best performance. Choosing xDSL or Other
Frame Relay Network causes the measured uplink speed to be reported slightly lower than before on such
connections, but gives much better results.
Detected xDSL or Frame Relay Network:
When Connection Type is set to Auto-detect, the automatically detected connection type is displayed
here.
ADD STREAMENGINE RULE
Automatic classification will be adequate for most applications, and specific StreamEngine™ Rules will
not be required. A StreamEngine™ Rule identifies a specific message flow and assigns a priority to that
flow.
Enable:
Each entry in StreamEngine™ Rules List can be active (enabled) or inactive (disabled)
Name:
Create a name for the rule that is meaningful to you.
Priority:
The priority of the message flow is entered here. 0 receives the highest priority (most urgent) and 255
receives the lowest priority (least urgent).
Protocol:
The protocol used by the messages.
Source IP Range:
The rule applies to a flow of messages whose LAN-side IP address falls within the range set here.
Source Port Range:
The rule applies to a flow of messages whose LAN-side port number is within the range set here.
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