They are both correct since the first bit is in the first byte. I think what you're getting at is that it just takes a single bit to indicate whether or not the frame includes source-routing. It's the Routing Information Indicator (RII) bit and it is the first bit transmitted. When looking at frames keep in mind that Token Ring sends the most significant bit first.
Priscilla At 10:43 AM 1/7/02, Hunt Lee wrote: >I am confused on the following issue: > >For Source-Route Bridging, I understand that the Source-Route bridge will >examine the Routing Info. Indicator in each Token frame to determine whether >it should forward the frame or not. If the value is zero, it will not >forward the frame. But if the value is one, it will forward the frame (am I >right so far?) > >My question is that is this Routing Info. Indicator located on the first >byte of Token-Ring source address (Caslow on p629), or first bit of Token >Ring source address? (Caslow p592) Coz I don't have a token network to play >with (and a sniffer), I can't tell which one is correct. > >Any help will be greatly appreciated. > >Best Regards, >Hunt Lee >IP Solution Analyst >Cable & Wireless ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=31188&t=31150 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
