80:(LAN) technology to interconnect the computers within a small organization in which these host computers were very close in proximity to each other. Over the years, Ethernet has become such a popular technology that it became the default Data Link Layer (OSI Layer 2) mechanism for data transport. This created a need for extending the Ethernet from a customer LAN bridging domain to service provider MAN, also known as the Provider bridging domain. For this, a 4 byte S-Tag or Service Tag, a type of Virtual LAN tag, was added to the header of the Ethernet frame in
342:
PBB defines a 48-bit B-DA and 48-bit B-SA to indicate the backbone source and destination MAC addresses. It also defines a 12-bit B-VID (backbone VLAN ID) and 24-bit I-SID (Service
Instance VLAN ID). The bridges in the PBB domain switch based on the B-VID and B-DA values, which contain 60 bits total.
88:
QinQ does not offer true separation of customer and provider domains but is merely a way to overcome the limitations on the VLAN identifier space. It can also help in separation of the customer and provider control domains when used with other features like control protocol tunneling or Per-VLAN
97:
The idea of PBB is to offer complete separation of customer and provider domains. For this purpose, a new
Ethernet header has been defined. This header may take multiple different forms, but the main components of the header are:
84:
standard. In the service provider domain, switching was based on S-Tag and destination MAC address, and C-tag was used to create virtual LAN within the customer domain. This technology is also known as QinQ or Q-tunneling.
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Spanning Tree etc. There is still the problem of having too little control on the MAC addresses, since QinQ forwarding is still based on the customer destination addresses. Thus, better mechanisms are needed.
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Bridges learn based on the B-SA and ingress port value and hence is completely unaware of the customer MAC addresses. I-SID allows distinguishing the services within a PBB domain.
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44:. It includes an architecture and a set of protocols for routing over a provider's network, allowing interconnection of multiple
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399:"Virtual Bridged Local Area Networks Amendment 10: Provider Backbone Bridge Traffic Engineering"
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committee for standardization. The final version was approved by the
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They are (in order, from most significant to least significant):
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The right transport foundation for carrier
Ethernet services
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in June 2008 and has been integrated into IEEE 802.1Q-2011.
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without losing each customer's individually defined
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350:PBB-TE standard, which was standardized in 2009.
330:bits : No Customer Access (NCA); e.g. OAM frames
27:Standard for bridging over a provider's network
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8:
353:PBB is sometimes referred to as MAC-in-MAC.
430:http://www.ieee802.org/1/pages/802.1ah.html
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305:Customer payload (e.g. IPv4 / TCP / HTTP)
290:Customer payload EtherType (e.g. 0x0800)
100:
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327:bits : Drop Eligible Indicator (DEI)
239:Customer destination address (C-DA)
224:Customer destination address (C-DA)
149:Backbone destination address (B-DA)
134:Backbone destination address (B-DA)
25:
272:Customer VLAN EtherType (0x8100)
185:Backbone VLAN identifier (B-VID)
324:bits : Priority Code Point (PCP)
287:Customer VLAN identifier (C-VID)
182:Backbone VLAN EtherType (0x88A8)
40:standard which adds support for
269:Customer source address (C-SA)
254:Customer source address (C-SA)
221:MIM Service identifier (I-SID)
206:MIM Service identifier (I-SID)
167:Backbone source address (B-SA)
152:Backbone source address (B-SA)
52:. It was initially created by
346:PBB is the foundation for the
56:before being submitted to the
1:
1802:Telecommunication protocols
406:IEEE Standard 802.1Qay-2009
76:was initially defined as a
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42:Provider Backbone Bridges
18:Provider Backbone Bridges
375:, Shortest Path Bridging
46:provider bridge networks
1771:Category:IEEE standards
336:bits : Reserved2 (RES2)
333:bits : Reserved1 (RES1)
33:is an amendment to the
200:MIM EtherType (0x88E7)
72:The now-ubiquitous
1797:Ethernet standards
78:local area network
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16:(Redirected from
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415:on July 6, 2010.
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408:. Archived from
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363:Carrier Ethernet
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854:WiMAX · d · e
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348:IEEE 802.1Qay
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410:the original
405:
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373:IEEE 802.1aq
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82:IEEE 802.1ad
71:
41:
31:IEEE 802.1ah
30:
29:
1333:legacy mode
93:Description
35:IEEE 802.1Q
1786:Categories
1711:Superseded
782:802 series
385:References
368:IEEE 802.1
203:MIM Flags
58:IEEE 802.1
38:networking
1586:Bluetooth
312:MIM Flags
1792:IEEE 802
1761:See also
1718:754-1985
1675:Proposed
1019:Ethernet
505:Revision
357:See also
104:Offsets
74:Ethernet
1702:P1906.1
1563:Wi-Fi 8
1539:Wi-Fi 7
1505:Wi-Fi 6
1454:Wi-Fi 5
1399:Wi-Fi 4
478:Current
68:History
1606:Zigbee
1574:802.15
1314:802.11
552:1149.1
107:Octet
54:Nortel
1697:P1823
1692:P1699
1687:P1619
1682:P1363
1464:WiGig
1328:-1997
1319:Wi-Fi
1028:-1983
1014:802.3
896:802.1
772:42010
767:29148
762:16326
757:16085
752:14764
747:12207
742:11073
413:(PDF)
402:(PDF)
50:VLANs
1748:1471
1743:1364
1738:1362
1733:1233
1728:1219
998:LACP
737:2050
732:2030
727:1905
722:1904
717:1902
712:1901
707:1900
702:1855
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