[j-nsp] Need suggestions..

[Kevin Wormington]

CFEB memory is where the actual paths/routes are stored in the hardware 
for forwarding.  IIRC it's usage is based on the number of distinct 
paths not how many feeds you have. ie. you could have 1 or 4 full feeds 
and still have ~300k paths which is what you observe with your 1 or 2 
feeds.  The original CFEB will hold ~500k paths, the CFEB-E ~1mil.

Kevin

TCIS List Acct wrote:
> All we use them for is IPv4 routing and BGP.  Nothing else.  Very few 
> local routes also.
> 
> Sounds like we'll need the RE-850 if we want to take more than our 2 
> full feeds though -- although others have said we may run out of CFEB 
> RAM first?  Excuse the newbie question, but what is the CFEB RAM used 
> for -- we have one router with one full feed and the CFEB is at 42% RAM, 
> another with two full feeds and the CFEB is at 42% also...
> 
> Kevin Wormington wrote:
>> We also have a few M7is with RE-400s and 768MB RAM and don't have any 
>> problems with a thousand or so logical interfaces and 2 full bgp feeds 
>> each (only 300+k routes in FIB, and full IPV6 tables).  The memory 
>> usage is at 95% but they don't swap and I think I remember seeing 
>> somewhere that the memory usage reported is always high in later JunOS 
>> releases (these are at 9.6R1.3).
>>
>> I think where you run into problems is if you are using some of the 
>> advanced services - ie a bunch of MPLS L3VPNs, etc.  If you are just 
>> routing IPV4/IPV6, dhcp relaying, BGP then I personally think they 
>> have quite a bit of life left in them.
>>
>> As far as I now, the CPU usage doesn't have anything to due with the 
>> amount of traffic that is transiting the router since it's done by the 
>> PFE hardware.
>>
>> Kevin
>>
>