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Quality of Service (QoS): Managing Bandwidth More Effectively

QoS Operating Notes and Restrictions

Table 8-15. Details of Packet Criteria and Restrictions for QoS Support

Packet

Criteria or

Restriction

QoS Classifiers DSCP

Overwrite

(Re-

Marking)

UDP/TCP Device

Priority (IP

Address)

IP Type-of-

Service

Layer 3

Protocol

VLAN Source

Port

Incoming

802.1p

Restricted to

IPv4 Packets

Only

Yes Yes Yes No No No No Yes

Allow Packets

with IP Options

3400cl and

6400cl: No

5300xl: Yes

3400cl and

6400cl: Yes

5300xl: Yes

3400cl and

6400cl: Yes

5300xl: Yes

3400cl and

6400cl: Yes

5300xl: Yes

3400cl and

6400cl: Yes

5300xl: Yes

3400cl and

6400cl: Yes

5300xl: Yes

3400cl and

6400cl: Yes

5300xl: Yes

3400cl and

6400cl: Yes

5300xl: No

Support IPv6

Packets

No No No 3400cl and

6400cl: n/a

5300xl: Yes

Yes Yes Yes No

Support Layer-2

SAP

Encapsulation

3400cl and

6400cl: No

5300xl: Yes

3400cl and

6400cl: No

5300xl: Yes

3400cl and

6400cl: No

5300xl: Yes

3400cl and

6400cl: No

5300xl: Yes

3400cl and

6400cl: Yes

5300xl: Yes

3400cl and

6400cl: Yes

5300xl: Yes

3400cl and

6400cl: Yes

5300xl: Yes

3400cl and

6400cl: No

5300xl: Yes

An “IP Option” is an optional, extra field in the header of an IP packet. If a 3400cl or 6400cl switch is configured with a

UDP/TCP classifier and a packet with an IP option is received, the switch uses the next-highest classifier that is configured

and applicable to actually match and classify the packet.

All Switches: For explicit QoS support of IPv6 packets, force IPv6 traffic into its own set of VLANs and then configure

VLAN-based classifiers for those VLANs.

On IPv4 packets with IP options, the 5300xl switches support QoS for 802.1p priority policies, but does not do any DSCP

re-marking for DSCP policies.

■ All Switches: For explicit QoS support of IP subnets, HP recommends

forcing IP subnets onto separate VLANs and then configuring VLAN-based

classifiers for those VLANs.

■ For Devices that Do Not Support 802.1Q VLAN-Tagged Ports:

For communication between these devices and the switch, connect

the device to a switch port configured as Untagged for the VLAN in

which you want the device’s traffic to move.

■ Port Tagging Rules: For a port on the switch to be a member of a

VLAN, the port must be configured as either Tagged or Untagged for

that VLAN. A port can be an untagged member of only one VLAN of

a given protocol type. Otherwise, the switch cannot determine which

VLAN should receive untagged traffic. For more on VLANs, refer to

chapter

2, “Static Virtual LANs (VLANs)”.

8-70

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ProCurve 5300xl Series

HP ProCurve 5300xl Series User Manual

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