[c-nsp] dcef disabled on VIP 2-40 Slot !!!

[David Freedman]

Pete Templin wrote:
> David Freedman wrote:
>>> The VIP4 is definitely a better card, but 128M VIP DRAM is plenty fine 
>>> for full tables for a while:
>> 
>> 
>> This is entriely dependant on :
>> 
>> a) how many full tables you see
> 
> No.  The VIP only gets the FIB, not the RIB and definitely not the Adj-RIB.

Sorry, this was actually indtnded to respond to the sentance "fine for 
full tables " where I was seeking clarification of this.

> 
>> b) how many CEF entries for internet addresses you are going to populate 
>> the dCEF table with at any one time.


We have a *lot* of internal routes in our iBGP , some of the linecards 
use around 150M just for the FIB, therefore we've standardised on using 
VIP4 with 256M as a configuration.


> 
> Acknowledged.  It'd take a LOT of load-sharing to drive 72MB of 
> single-path data to exceed 128MB (minus an appropriate comfort margin), 
> but it could certainly be done.
> 
>>  From our point of view, 128M is never enough.
> 
> So noted.  I'd think that one would have long before exceeded the DRAM 
> capabilities of RSP4/8 and have moved up to RSP16, and therefore should 
> have a well-practiced excuse on why they're running VIP2s (or 
> underpopulated VIP4s/VIP6s) in an RSP16 chassis.
> 
> pt
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