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
TCIS List Acct wrote:
We have 4 M7i's with RE-400's and 768M RAM and have never had a problem
with taking full routes (we are at 55% memory usage right now).
With all of the comments on this topic, should we be worried?
Our units push ~200Mbit traffic, so they are nowhere near capacity CPU
wise.
I can confirm your worry about the RE-850.
We had one box with a full Internet table (~310K prefixes) *and* a
reasonable number of L3VPNs with a total of ~160K prefixes, *and* a
high number of interfaces. This box needed enough RE memory that we
started seeing swap usage. Not good.
Now the box has a reduced Internet table, and is happy.
Steinar Haug, Nethelp consulting, [email protected]
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