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Page 176 / 324 Scroll up to view Page 171 - 175
Chapter 14 Quality of Service (QoS)
P-660HN-TxA User’s Guide
176
The following table describes the labels in this screen.
14.3
QoS Technical Reference
This section provides some technical background information about the topics
covered in this chapter.
14.3.1
IEEE 802.1p
IEEE 802.1p specifies the user priority field and defines up to eight separate traffic
types. The following table describes the traffic types defined in the IEEE 802.1d
standard (which incorporates the 802.1p).
Table 59
Advanced Setup > QoS > QoS Settings Summary
LABEL
DESCRIPTION
Rules
#
This is the rule’s index number.
Active
This shows whether the rule is enabled or disabled.
Physical Ports
This is the physical port associated with the rule.
Destination MAC
and IP/Mask
Port Ranges
This is the port range for destination MAC address and IP address.
Source MAC and
IP/Mask Port
Ranges
This is the port range for source MAC address and IP address.
Protocol ID
This is the protocol ID associated with the rule.
VLAN ID
This is the VLAN ID associated with the rule.
IPP/TOS (DSCP)
This shows the IPP/TOS or DSCP settings.
802.1p
This is the 802.1p priority level.
Actions
IPP/TOS (DSCP)
Remarking
The ZyXEL Device re-assigns the priority values specified in this field
to matched traffic.
802.1p
Remarking
The ZyXEL Device re-assigns the priority levels specified in this field
to matched traffic.
Queue #
The ZyXEL Device assigns the queue level specified in this field to
matched traffic.
Table 60
IEEE 802.1p Priority Level and Traffic Type
PRIORITY
LEVEL
TRAFFIC TYPE
Level 7
Typically used for network control traffic such as router configuration
messages.
Level 6
Typically used for voice traffic that is especially sensitive to jitter (jitter is the
variations in delay).
Page 177 / 324
Chapter 14 Quality of Service (QoS)
P-660HN-TxA User’s Guide
177
14.3.2
IP Precedence
Similar to IEEE 802.1p prioritization at layer-2, you can use IP precedence to
prioritize packets in a layer-3 network. IP precedence uses three bits of the eight-
bit ToS (Type of Service) field in the IP header. There are eight classes of services
(ranging from zero to seven) in IP precedence. Zero is the lowest priority level and
seven is the highest.
14.3.3
Automatic Priority Queue Assignment
If you enable QoS on the ZyXEL Device, the ZyXEL Device can automatically base
on the IEEE 802.1p priority level, IP precedence and/or packet length to assign
priority to traffic which does not match a class.
The following table shows you the internal layer-2 and layer-3 QoS mapping on
the ZyXEL Device. On the ZyXEL Device, traffic assigned to higher priority queues
gets through faster while traffic in lower index queues is dropped if the network is
congested.
Level 5
Typically used for video that consumes high bandwidth and is sensitive to
jitter.
Level 4
Typically used for controlled load, latency-sensitive traffic such as SNA
(Systems Network Architecture) transactions.
Level 3
Typically used for “excellent effort” or better than best effort and would
include important business traffic that can tolerate some delay.
Level 2
This is for “spare bandwidth”.
Level 1
This is typically used for non-critical “background” traffic such as bulk
transfers that are allowed but that should not affect other applications and
users.
Level 0
Typically used for best-effort traffic.
Table 60
IEEE 802.1p Priority Level and Traffic Type
PRIORITY
LEVEL
TRAFFIC TYPE
Table 61
Internal Layer2 and Layer3 QoS Mapping
PRIORITY
QUEUE
LAYER 2
LAYER 3
IEEE 802.1P
USER PRIORITY
(ETHERNET
PRIORITY)
TOS (IP
PRECEDENCE)
DSCP
IP PACKET
LENGTH (BYTE)
0
1
0
000000
1
2
2
0
0
000000
>1100
Page 178 / 324
Chapter 14 Quality of Service (QoS)
P-660HN-TxA User’s Guide
178
3
3
1
001110
001100
001010
001000
250~1100
4
4
2
010110
010100
010010
010000
5
5
3
011110
011100
011010
011000
<250
6
6
4
100110
100100
100010
100000
5
101110
101000
7
7
6
110000
111000
7
Table 61
Internal Layer2 and Layer3 QoS Mapping
PRIORITY
QUEUE
LAYER 2
LAYER 3
IEEE 802.1P
USER PRIORITY
(ETHERNET
PRIORITY)
TOS (IP
PRECEDENCE)
DSCP
IP PACKET
LENGTH (BYTE)
Page 179 / 324
P-660HN-TxA User’s Guide
179
C
HAPTER
15
Dynamic DNS Setup
15.1
Overview
Dynamic DNS allows you to update your current dynamic IP address with one or
many dynamic DNS services so that anyone can contact you (in NetMeeting, CU-
SeeMe, etc.). You can also access your FTP server or Web site on your own
computer using a domain name (for instance myhost.dhs.org, where myhost is a
name of your choice) that will never change instead of using an IP address that
changes each time you reconnect. Your friends or relatives will always be able to
call you even if they don't know your IP address.
First of all, you need to have registered a dynamic DNS account with
www.dyndns.org. This is for people with a dynamic IP from their ISP or DHCP
server that would still like to have a domain name. The Dynamic DNS service
provider will give you a password or key.
15.1.1
What You Can Do in the DDNS Screen
Use the
Dynamic DNS
screen (
Section 15.2 on page 180
) to enable DDNS and
configure the DDNS settings on the ZyXEL Device.
15.1.2
What You Need To Know About DDNS
DYNDNS Wildcard
Enabling the wildcard feature for your host causes *.yourhost.dyndns.org to be
aliased to the same IP address as yourhost.dyndns.org. This feature is useful if
you want to be able to use, for example, www.yourhost.dyndns.org and still reach
your hostname.
If you have a private WAN IP address, then you cannot use Dynamic DNS.
Page 180 / 324
Chapter 15 Dynamic DNS Setup
P-660HN-TxA User’s Guide
180
15.2
The Dynamic DNS Screen
Use this screen to change your ZyXEL Device’s DDNS. Click
Advanced >
Dynamic DNS
. The screen appears as shown.
Figure 87
Advanced > Dynamic DNS
The following table describes the fields in this screen.
Table 62
Advanced > Dynamic DNS
LABEL
DESCRIPTION
Dynamic DNS Setup
Active
Dynamic DNS
Select this check box to use dynamic DNS.
Service
Provider
This is the name of your Dynamic DNS service provider.
Dynamic DNS
Type
Select the type of service that you are registered for from your Dynamic
DNS service provider.
Host Name
Type the domain name assigned to your ZyXEL Device by your Dynamic
DNS provider.
You can specify up to two host names in the field separated by a comma
(",").
User Name
Type your user name.
Password
Type the password assigned to you.
Enable
Wildcard
Option
Select the check box to enable DynDNS Wildcard.
Apply
Click this to save your changes.
Cancel
Click this to restore your previously saved settings.

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