[c-nsp] An observation: 512k default max-prefix in IOS-XR

[Phil Bedard]

If you are willing to spend the money on the latest gen cards, the Typhoon
linecards support 4M IPv4/2M IPv6 in the FIB along with 2M MACs.  There
are no different scale profiles for the cards to monkey around with
either.     

Not really part of this conversation but I just ran across this somewhat
amusing message on a Typhoon card.

LC/0/0/CPU0:Apr 29 22:17:59.355 : rsi_agent[306]:
%OS-RSI_AGENT-6-CARD_ROLE_CHANGE : Based on the card configuration/type,
the AFI IPv6 role of the card has changed from Invalid to Not Interested

Phil 

On 4/28/12 3:46 PM, "Sigurbjörn Birkir Lárusson" <sigurbjornl at vodafone.is>
wrote:

>8 years ago when Cisco introduced the 3BXL, 1M routes was a lot of routes,
>more than 5 times the size of the current Internet routing table, now,
>it's not.
>
>
>1M routes also doesn't mean 1M routes. IPv6, Multicast and IPv6 Multicast
>take up more space, further reducing the available tcam resources.
>
>
>With an expanding IPv6 table and a never-ending fragmentation of the IPv4
>space, plus whatever multicast and MPLS you are doing, it might prove to
>be insufficient moving forward, and in some cases depending on what you're
>doing, it might already be.
>
>The L3XL kills off video monitoring and requires an even more expensive
>license and this is one of the main reasons the ASR9k doesn't sound that
>exciting to me at this point.  I'd like to see a lot more available tcam
>space before committing to a new platform long term.
>
>Kind regards,
>Sibbi
>
>On 28.4.2012 13:15, "Robert Blayzor" <rblayzor.bulk at inoc.net> wrote:
>
>>On Apr 25, 2012, at 9:17 PM, Will Hargrave wrote:
>>> So around 2015 or perhaps before, careless operators of both IOS-XR and
>>>7600 boxes may have a shock. :-)
>>
>>
>>Careless operators of 9K that don't change from the default scale maybe.
>>That's just a default limitation on the 9K.
>>
>>Just change from the "default" scale to l3 or l3xl scale and you'll be
>>good for 1M+ routes.  Of course L3 scale eats up L2 scale and vice versa,
>>so choose your battles wisely.
>>
>>-- 
>>Robert Blayzor
>>INOC, LLC
>>rblayzor at inoc.net
>>http://www.inoc.net/~rblayzor/
>>
>>
>>
>>
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