this bug is inactive for ~5years, I close it now
** Changed in: neutron
Status: Confirmed => Won't Fix
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https://bugs.launchpad.net/bugs/1505631
Title:
[RFE] QoS VLAN 802.1p Support
Status in neutron:
Won't Fix
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.
This requirement mainly focus provider networks.
Note: For the tenant network it can only work if the traffic is segmented via
VLANs and does nothing for other type of segmentation.
[Benefits]
- Enhancement to the existing QoS functionality.
[What is the enhancement?]
- Add VLAN tagging support to the QoS extension for provider's network.
- Add additional command lines for realizing Vlan tag support.
- 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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