ecrit-1----Page:4
1 2 3 4 5 6 7 8 9 10
|
IEEE 802.1ABrev Revision of IEEE 802.1AB – LLDP PAR approved November 2006 New information elements and a mechanism for faster exchange of information (‘fast start’) for early exchange of capabilities Similar to and compatible with LLDP-MED ‘Fast Start’ (some open questions) Mainly to support layer 2 Congestion Management and Audio-Video Bridging Can also be used to push location information (same as LLDP-MED today) New destination addresses and explicit forwarding rules to accurately define the topology over transparent forwarding devices like the ones defined by IEEE 802.1ad (provider bridges) and 802.1aj (two-port media relays – TPMR) Breaks the original assumption that all LLDP devices are connected on the same media (LLDP-MED would remain single L2 link-specific) Support for IEEE 802.3at (extended Power over Ethernet, “PoE Plus”) Liaison with TIA TR41.4 see http://www.ieee802.org/1/files/public/docs2007/liaison-to-tr41-4-0307.txt |