[c-nsp] Next step-up from 7206VXR

Jon Lewis jlewis at lewis.org
Tue Feb 19 18:39:42 EST 2013

The Sup720-3bxl (and Sup2T and RSP720) will run out of tcam before 
the "churn of [a couple of] full feeds" makes them non-viable.

We're getting close to a repeat of 2008, where lots of 6500s (those still 
running Sup2s) were inching up against their maximum supported routes when 
dealing with full views.  Sometime in the next year or so, the default 
IPv4/IPv6 split on the best Sups you can get today are going run out of 
IPv4 FIB TCAM.  Some will tune (or already have tuned) the split to buy 
another year or so, others will do so only after some head scratching when 
their 6500s fall over.

The question is, will cisco release a bigger FIB TCAM sup for the 6500, or 
will they allow this product line to end its useful life as a full 
view internet router in order to push people into ASRs or competitors' 

  On Tue, 19 Feb 2013, Pete Lumbis wrote:

> Both Sup2t and RSP720 (to a lesser extent but still much better than
> Sup720) can handle the churn of full feeds.
> On Tue, Feb 19, 2013 at 5:10 PM, Tony Varriale <tvarriale at comcast.net>wrote:
>> On 2/19/2013 2:57 PM, Jon Lewis wrote:
>>> On Tue, 19 Feb 2013, Eric A Louie wrote:
>>>  I've run out of port capacity on my 7206VXR and need to go to "the next
>>>> router"
>>>> or put in another 7206VXR side-by-side.
>>>> Any recommendations on what to use if I were to replace my existing
>>>> 7206VXR with
>>>> another chassis?  (it's limited to 5 GB interfaces, and we need 7 or 8)
>>> You've got to say more about what the router is doing and what you need
>>> from it.  If it's routing for 8 1gb ethernets and doing full BGP routes,
>>> and nothing special, then a 6500 is an attractive option bang for your
>>> buck-wise.  They're made for ethernet and comparitively cheap to keep
>>> adding ports to.
>>>  Except when said 6500 sup CPU is asked to do BGP intensive stuff :)
>> tv
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  Jon Lewis, MCP :)           |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                |
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