Sorry to resurrect an old thread, but I'm also confused on this
ASR1001 FIB question.
The Cisco ASR 1000 ESP data sheet
(http://www.cisco.com/en/US/prod/collateral/routers/ps9343/data_sheet_c78-450070.html)
lists the ASR1001 separately from the ASR1002-5G. It claims the
ASR1001 does 1M IPv4 and 1M IPv6 routes. (Not to be confused with the
numbers on the ASR 1000 RP data sheet, which say it can do up to 9M
with 8GB RAM doing selective download.)
Does anyone have a link to a definitive document clearly showing FIB
numbers for the ASR1001? I've got an email into our Cisco SE, but I
don't think they're motivated to sell us a lower-end box.
On that link, Tables 1 and 3 contradict each other re: the
ASR1001.
However, I confirmed with our SE, and he says no way the
ASR1001 supports anything more than 512,000 v4 entries and
128,000 v6 entries (which is Table 3).
Maybe someone on the list from Cisco can help fix the
documentation.
I made sure with the BU, and they confirmed that ASR1001 with 8GB RAM can
handle 1M routes per the data sheet.
The difference between ASR1001 and ASR1002 with EFP5 is due to a more
powerful integrated RP on ASR1001 (Not really RP2, but closer to RP2 than
RP1) and more memory (4GB is max on RP1)
I guess it has to do with the fact that every FIB entry also has a data
structure on the RP, as control plane has to calculate the FIB (i.e.
CEF...) and then copy the result into the forwarding plane (ESP).
So we're saying that the forwarding plane on the ASR1001 can
handle 1,000,000 hardware entries out of the factory, but
that you'll need to have the 8GB of control plane memory
installed in the router to achieve that?
Interesting. I'd have thought 4GB of control plane memory
would be sufficient :-).
The low end ASRs are poor boxes for full BGP table internet edge
applications. They have many other great applications, but the reason they
are bad here is simply route limits in the FIB.
The asr1001 only supports 512,000 IPV4 routes in the FIB at any given point
in time, and 128,000 IPV6 routes.
The full IPV4 table will exceed that soon, and that will be well within the
lifespan of the box.
The 1 million figure is for route reflector applications only.
The low end ASRs are poor boxes for full BGP table internet edge
applications. They have many other great applications, but the reason they
are bad here is simply route limits in the FIB.
The asr1001 only supports 512,000 IPV4 routes in the FIB at any given point
in time, and 128,000 IPV6 routes.
