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
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