"marcel.durega...@yahoo.fr" <marcel.durega...@yahoo.fr> writes:
> Hi everyone, > > Anybody from Yahoo to share experience on IGP choice ? > IS-IS vs OSPF, why did you switch from one to the other, for what reason ? > Same question could apply to other ISP, I'd like to heard some > international ISP/carriers design choice, please. > > Thank in advance, > Best regards, > -Marcel I worked a project as recently as 2009 where we tried to connect two 6509s together over a tunnel interface and wanted to extend Area 0 across it and couldn't because it was a limitation of the version of IOS we were running at the time. That forced us to use isis. It was a decision based on pragmatism rather than design choice; and we were a small operator, too. The choice of an interior routing protocol really doesn't have much implication for small operators.
