Hi Skeeve,
On 18/10/2012, at 10:04 AM, Skeeve Stevens <[email protected]>
wrote:
> Question is.... the specs say it can support a maximum of 700k routes.
>
> Now, if what I suspect is right, that is great, but I am getting
> conflicting information.
>
The way I read the data sheets is the maximum "supported/tested" in forwarding
table is 700k.
> A full feed at the moment is about 430k routes. So I am hoping that the
> SRX550 could take multiple full feeds... lets say - 3-4, and it just
> installs a single unique copy of the full feed which is way under the 700k
> threshold.
>
That is correct. The advertised values are referring to supported/tested FIB,
whereas RIB will hold as much as you have memory available (within reason).
> But someone was trying to tell me that it couldn't take two world feeds as
> together they are 860k routes.. but my gut feeling is that this is wrong as
> I am not sure what purpose the SRX550 having 700k route capacity would be
> if it operated that way.
This is simply not true - I have a customer whose SRX100H is taking one full
view (though data sheet says 8K), and another with an SRX240H with 3 separate
feeds and no issues.
Where you will come unstuck is if you start dumping each feed into separate
VRFs, then you'll start burning more FIB, and as always the infamous KRT
queueing "feature" can bite you during fail-over (though I have to say I don't
see it on SRX/J all that often).
Here's what a J6350 with 2GB of memory looks like with 3 feeds (this is an old
snapshot back when the DFZ was ~350k):
Groups: 2 Peers: 3 Down peers: 0
Table Tot Paths Act Paths Suppressed History Damp State Pending
inet.0 1056579 354871 0 0 0 0
Peer AS InPkt OutPkt OutQ Flaps Last Up/Dwn
State|#Active/Received/Accepted/Damped...
x.x.x.x yyyyy 322391 3804 0 6 1:24:31
143268/353090/353090/0 0/0/0/0
x.x.x.x yyyyy 86256 192 0 2 1:24:32
2/353091/353091/0 0/0/0/0
x.x.x.x yyyyy 125597 13456 0 0 4d 4:56:06
211601/350398/350398/0 0/0/0/0
Only "active" routes are installed in FIB - the rest sit in RIB. Here's what
memory usage looks like for the above:
> show chassis routing-engine
Routing Engine status:
Temperature 26 degrees C / 78 degrees F
CPU temperature 45 degrees C / 113 degrees F
Total memory 2048 MB Max 1044 MB used ( 51 percent)
Control plane memory 1472 MB Max 618 MB used ( 42 percent) <---
RIB sits here
Data plane memory 576 MB Max 420 MB used ( 73 percent) <---
FIB sits here
CPU utilization:
User 0 percent
Real-time threads 9 percent
Kernel 0 percent
Idle 91 percent
Model RE-J6350-3400
Also, when using SRX, make sure all your peers are in the same security zone to
handle asymmetry issues that may arise.
Ben
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