[c-nsp] Cisco 6506E 4Byte ASN IOS Support

Gert Doering gert at greenie.muc.de
Fri Apr 8 06:23:05 EDT 2016


On Fri, Apr 08, 2016 at 10:21:33AM +0100, Nick Hilliard wrote:
> Gert Doering wrote:
> > On Thu, Apr 07, 2016 at 12:15:16PM -0700, Jason Berenson wrote:
> >> s72033-advipservicesk9_wan-mz.122-18.SXF6.bin
> > 
> > This is slightly prehistoric...
> > 
> > We're fairly happy with 15.1(2)SY4 and with 12.2(33)SXI14.  
> IOS 15.x on this platform uses significantly more memory on the RP than
> the 12.22(18)SX train.  If the devices are handling full routes, this is
> likely to be a problem.

Oh, thanks for the warning.  For mostly "testing/rollout" reasons, we 
currently have 15.1S only on non-XL boxes with a very small table (~4000 
prefixes), and while the difference in memory usage is quite visible, 
it's far from "an issue".

OTOH we don't do "truly full" routes on the XL boxes either (stripped
down by a lot of /23 and /24 deaggregates from other regions), so they
are still mostly usable - wouldn't run a "full full!" table on Sup720s
anymore today.  BGP scheduler is too bad for the slowness of the CPU
(100% CPU is not something I worry about - that's what the CPU is 
there for :-) - but 100% CPU due to one BGP neighbour sending in tons
of updates should never *ever* cause flapping on other BGP neighbours 
due to missed keepalives)...

USENET is *not* the non-clickable part of WWW!
Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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