802.1Qbh - Bridge Port Extension
The full title of this PAR is "IEEE Standard for Local and Metropolitan Area Networks---Virtual Bridged Local Area Networks - Amendment: Bridge Port Extension.".
This amendment specifies protocols, procedures, and managed objects to support Port Extension. A Port Extender attaches to a MAC port of an 802.1Q bridge and provides additional MAC ports that are logically ports of the 802.1Q bridge to which it is attached (i.e. the "Controlling Bridge"). The protocols, procedures, and managed objects specified in this amendment are expected to specify new behavior in bridges that support port extension as well as the behavior of Port Extenders themselves. In addition, the protocols, procedures, and managed objects specified in this amendment support the cascading of Port Extenders. To the extent technically reasonable, all frame filtering and relay functions remain in the Controlling Bridge. Use of a Service Virtual LAN Tag (S-TAG) for Multichannel capability as being defined in Edge Virtual Bridging is envisaged to achieve this objective. A new on-the-wire indication (e.g. a new tag) is envisioned to support remote replication for purposes including frame flooding and group address support.
The purposes of this project include: - To reduce the management cost of networks comprising large number of bridges (such as those commonly found in a data center environments) through significant reduction in both the number of devices to be managed and the management traffic required. - To decrease total cost of ownership by reducing initial capital expenditure along with management and operational costs.
Data center management today is highly complex. This complexity may be reduced by aggregating the more complex bridging functions onto fewer bridges and by collapsing bridge layers from a management perspective. The EVB project is defining reflective relay and multichannel capabilities. The Port Extension project extends these capabilities by providing a remote replication service. In addition, a Port Extender device will be specified that utilizes the EVB capabilities and remote replication service. This is intended to reduce management complexity by aggregating the more complex bridging functions onto fewer bridges. The Port Extender device may be used to collapse layers in the network resulting in reduced capital expenditure, points of management, and management traffic and thus reducing total cost of ownership.
| Status | PAR approved December 9th, 2009; PAR withdrawn September 10th, 2011. See 802.1BR. |
| Editor | Joe Pelissier |
| Date | Document |
|---|---|
| 21 Jan 2010 | Presentation bh-pelissier-draft00intro-0110.pdf |
| 17 Mar 2010 | Presentation bh-pelissier-control-overview-0310-v02.pdf |
| 13 Apr 2010 | Presentation bh-pelissier-control-overview-0410.pdf |
| 26 Apr 2010 | Presentation bh-pelissier-control-overview-0410-v02.pdf |
| 26 May 2010 | Presentation bh-pelissier-editors-report-0510-v02.pdf |
| 26 May 2010 | Presentation bh-pelissier-multicast-overview-0510.pdf |
| 12 Jul 2010 | Presentation bh-pelissier-d0-3-discussion-0710.pdf |
| 12 Jul 2010 | Presentation bh-pelissier-editors-report-0710.pdf |
| 13 Sep 2010 | Presentation bh-bottorff-arch-0810-v1.pdf |
| 15 Sep 2010 | Presentation bh-pelissier-genericbridges-0910.pdf |
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