NETGEAR S3300-28X (GS728TX) 24x1GE - Инструкция по эксплуатации - Страница 234

Configuring Quality of Service 

234

S3300 Smart Managed Pro Switch 

IPv6 Class Configuration

The IPv6 Class Configuration feature extends the existing QoS ACL and DiffServ 
functionality by providing support for IPv6 packet classification. An Ethernet IPv6 packet is 
distinguished from an IPv4 packet by its unique EtherType value, so all IPv6 classifiers 
include the EtherType field. An IPv6 access list serves the same purpose as its IPv4 
counterpart. 

Prior to the IPv6 class feature, any DiffServ class definition was assumed to apply to an IPv4 
packet. That is, any match item in a class rule was interpreted in the context of an IPv4 
header. An example is a class rule that specifies an L4 Port match value. With the 
introduction of the IPv6 match capability, it must be specified if this class rule is for IPv4 or for 
IPv6 packets. To facilitate this distinction, a class configuration parameter is added to specify 
whether a class applies to IPv4 or IPv6 packet streams.

The Destination and Source IPv6 addresses use a prefix length value instead of an individual 
mask to qualify it as a subnet address or a host address. The flow label is a 20-bit number 
that is unique to an IPv6 packet, used by end stations to signify some form of 
quality-of-service (QoS) handling in routers. 

Packets that match an IPv6 classifier are only allowed to be marked using the 802.1p (COS) 
field or the IP DSCP field in the Traffic Class octet. IP Precedence is not defined for IPv6: this 
is not an appropriate type of packet marking.

IPv6 ACL/DiffServ assignment is appropriate for LAG interfaces. The procedures described 
by an ACL or DiffServ policy are equally applicable on a LAG interface.



To create a new IPv6 class:

1. 

Select 

QoS 

>

 DiffServ 

>

 Advanced 

>

 IPv6 Class Configuration

.

2. 

Enter a class name in the Class Name field.

3. 

Select the class type to associate with the policy.

4. 

Click the 

Add

 button. 

The switch supports only the Class Type value All, which means all the various match 
criteria defined for the class should be satisfied for a packet match. All signifies the logical 
AND of all the match criteria.

5. 

Click the 

Cancel

 button to cancel the configuration on the screen, and reset the data on the 

screen to the latest value of the switch.



To rename an existing class:

1. 

Select the check box next to the configured class.

2. 

In the Class Name field, specify the new name.

3. 

Click the 

Apply

 button.



To delete a class:

1. 

Select the check box next to the class name.

2. 

Click the 

Delete

 button.