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["vikram.choudhary" <vikram.choudhary@xxxxxxxxxx>]

Public bug reported:

[Overview]
The IEEE 802.1p signaling standard defines traffic prioritization at Layer 2 of the OSI model. Layer 2 network devices, such as switches, that adhere to this standard can group incoming packets into separate traffic classes.The 802.1p standard is used to prioritize packets as they traverse a network segment (subnet).When a subnet becomes congested, causing a Layer 2 network device to drop packets, the packets marked for higher priority receive preferential treatment and are serviced before packets with lower priorities.

The 802.1p priority markings for a packet are appended to the MAC
header.On Ethernet networks, 802.1p priority markings are carried in
Virtual Local Area Network (VLAN) tags. The IEEE 802.1q standard defines
VLANs and VLAN tags. This standard specifies a 3-bit field for priority
in the VLAN tag, but it does not define the values for the field. The
802.1p standard defines the values for the priority field. This standard
defines eight priority classes (0 - 7). Network administrators can
determine the actual mappings, but the standard makes general
recommendations. The VLAN tag is placed inside the Ethernet header,
between the source address and either the Length field (for an IEEE
802.3 frame) or the EtherType field (for an Ethernet II frame) in the
MAC header. The 802.1p marking determines the service level that a
packet receives when it crosses an 802.1p-enabled network segment.

[Proposal]
Existing QoS [1]_ framework can be extend for supporting VLAN priority.

[Benefits]
- Enhancement to the existing QoS functionality.

[What is the enhancement?]
- Add VLAN tagging support to the QoS extension.
- Add additional command lines for realizing ECN functionality.
- Add OVS support.

[Related information]
[1] QoS
   https://review.openstack.org/#/c/88599/
[2] Specification
    https://blueprints.launchpad.net/neutron/+spec/vlan-802.1p-qos

** Affects: neutron
     Importance: Undecided
     Assignee: vikram.choudhary (vikschw)
         Status: New


** Tags: rfe

** Changed in: neutron
     Assignee: (unassigned) => vikram.choudhary (vikschw)

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https://bugs.launchpad.net/bugs/1505631

Title:
  QoS VLAN 802.1p Support

Status in neutron:
  New

Bug description:
  [Overview]
  The IEEE 802.1p signaling standard defines traffic prioritization at Layer 2 of the OSI model. Layer 2 network devices, such as switches, that adhere to this standard can group incoming packets into separate traffic classes.The 802.1p standard is used to prioritize packets as they traverse a network segment (subnet).When a subnet becomes congested, causing a Layer 2 network device to drop packets, the packets marked for higher priority receive preferential treatment and are serviced before packets with lower priorities.

  The 802.1p priority markings for a packet are appended to the MAC
  header.On Ethernet networks, 802.1p priority markings are carried in
  Virtual Local Area Network (VLAN) tags. The IEEE 802.1q standard
  defines VLANs and VLAN tags. This standard specifies a 3-bit field for
  priority in the VLAN tag, but it does not define the values for the
  field. The 802.1p standard defines the values for the priority field.
  This standard defines eight priority classes (0 - 7). Network
  administrators can determine the actual mappings, but the standard
  makes general recommendations. The VLAN tag is placed inside the
  Ethernet header, between the source address and either the Length
  field (for an IEEE 802.3 frame) or the EtherType field (for an
  Ethernet II frame) in the MAC header. The 802.1p marking determines
  the service level that a packet receives when it crosses an 802.1p-
  enabled network segment.

  [Proposal]
  Existing QoS [1]_ framework can be extend for supporting VLAN priority.

  [Benefits]
  - Enhancement to the existing QoS functionality.

  [What is the enhancement?]
  - Add VLAN tagging support to the QoS extension.
  - Add additional command lines for realizing ECN functionality.
  - Add OVS support.

  [Related information]
  [1] QoS
     https://review.openstack.org/#/c/88599/
  [2] Specification
      https://blueprints.launchpad.net/neutron/+spec/vlan-802.1p-qos

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