Internals fans, I'm reading the book, "Inside Cisco IOS Software Architecture" as background for chapter 7 of the Sem8 (troubleshooting) online CNAP curriculum. If you haven't read it, I recommend it for anyone who wants to learn about router components (buffers, memory, processors, switching fabrics, buses). Even for a non-EE like me it's a good read.
In chapter 7 the authors explain how the 12000 segments packets into 64-byte cells: 8-byte header, 48-byte payload, 8-byte CRC/trailer. That surprised me, that cell switching is the foundation of a high-end router. Does anyone know if this is common among other vendors? I'd like to browse through some theory books that compare / contrast various switching technologies, to get a better idea of the possibilities for the future. Specifically, a book that discusses fixed-length vs. variable-length swtiching. Does anyone have a bibliography like that? Also, would someone who has a 12000 router please send me the output of the "show controller tofab queue" command. I want to compare it to Example 7-3 (p. 158). I assume that one could use the keyword "frfab" instead of "tofab" to get information on the transmit buffers. If so, could you provide the output of that command too (sho controller frfab queue). Does "carving" refer to the carving / assignment of shared memory? -- TIA, TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=41475&t=41475 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
