Chapter 4. Source Routing Bridges
Source route bridging was at one time a proposal before the IEEE 802.1 committee, competing against transparent bridging as the standard for connecting LANs in the data link layer. When the 802.1 committee decided to adopt transparent bridging, the proponents of source routing brought the concept to the 802.5 committee to standardize as a method of interconnecting 802.5 LANs.
For some time, transparent bridges and source routing bridges evolved independently. Then there arose the need to design a means of interconnecting extended LANs attached via source routing bridges with extended LANs attached via transparent bridges. This type of bridge was known as the SR-TB (source routing to transparent bridging) bridge. ...
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