From: John Gibson (johngibson1541@yahoo.com)
Date: Wed Apr 11 2007 - 12:01:13 ART
3550's doc says "The CIST in a MST region is the same
as the CST outside a region."
Couldn't believe that.
802.1Q's MSTP chapter's first paragraph basically
says the IST must match CST's tree from the border
down stream.
My mental picture is that CIST is pretty much just a
fancier version of CST. Same size in terms of # of
vertex.
Am I thinking right?
Also when they reduce BPDU to only sent in IST
instance,
there must be a hell lot of work for CPU to keep the
entire picture of a region right? Switches didn't need
to know the entire picture before in PVST right?
Analogous to OSPF putting entire picture of an area
into a router's software? Very CPU demanding.
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This archive was generated by hypermail 2.1.4 : Tue May 01 2007 - 08:28:35 ART