[j-nsp] ispf support on Juniper routers
Richard A Steenbergen
ras at e-gerbil.net
Tue Mar 10 01:21:35 EDT 2009
On Mon, Mar 09, 2009 at 08:53:57PM -0700, Paul Goyette wrote:
> The other interesting thing is that the router needs to keep
> additional state information in the internal OSPF routing
> tables to enable ISPF. In my opinion, with today's routers,
> memory seems to be more of a limitation than CPU horsepower.
Really? It seems like control plane memory is absurdly cheap and
plentiful these days. I can't even think of any situation outside of a
memory leak in which I've run low on memory on a well maintained modern
router (i.e. not dusting off an old 7507 in 2009) in the last 10 years.
Modern Juniper RE's have all been shipping for 4GB for a few years now
(with more to come soon, no doubt), while last I heard rpd can't even
address more than 2GB currently. It doesn't seem like I or anyone else
with a reasonable router config (not counting massive route-server apps
which would be better served by JCS anyways) are in any danger of
running out any time soon.
Meanwhile, my RE's are constrained at 100% CPU every single time there
is any instability or reconvergence event in the network (or sometimes
they're at 100% cpu 24/7 depending on how many unresolved rpd bugs I'm
being affected by at any given moment :P). Given those realities, I'd
gladly trade memory for better performance any day of the week.
Richard A Steenbergen <ras at e-gerbil.net> http://www.e-gerbil.net/ras
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