6 Jan
1999
6 Jan
'99
4:01 p.m.
It may have been the result of vendor choice/issue in the past but I don't see to many people running IS-IS planning to switch over any time soon.
There could be many reasons for not changing protocols running on a large scale network. One of them (an important one) is the cost of training supporting engineers and operational personnels. So it has to be a significant improvement of the protocol to-be or really broken of existing protocol to warrant such a change, IMO. --Jessica