Netgear GS752TXS Technical Information download pdf (Page 183)

Chapter 6: Configuring Quality of Service | 183

GS752TXS Smart Switch Software Administration Manual

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 presents a similar purpose as its IPv4

counterpart.

Prior to this 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 display the page, click QoS

 DiffServ  Advanced  IPv6 Class Configuration.

To configure a IPv6 class:

1. To create a new class, enter a class name, select the class type, and click Add.

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Netgear GS752TXS Technical Information Page 183