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Whats so difficult about ISSU
On Mon, 12 Nov 2012, Bryan Fields wrote:
> And they only have to process maybe 2mbit/s of control traffic during
> busy hour. The rest is handled by dedicated hardware/ASIC's. Each one
> has a fully redundant hardware circuit pack and a bunch of monitoring to
> switch over in case one fails.
I'd imagine it's also because some are written in a language especially
designed for the task.
"... It supports hot swapping, so that code can be changed without
stopping a system."
I've been told some people are doing routing control plane implementations
in erlang just because of these features, but I'd imagine there is a
hurdle getting enough programmers who are experienced in the language.
Mikael Abrahamsson email: swmike at swm.pp.se