[f-nsp] CER FIB capacity

[Greg Hankins]

Hi Rob, the CER routers use SRAM for the IPv4/v6 FIB instead of CAM, so
for the CES/CER/CER-RT platforms the scalability is dynamic for all IP
routes in the FIB (vs the MLX CAM architecture where we have to choose
fixed partition sizes which can support a maximum number).

Scalability depends on how the memory is used by IPv4 and IPv6 routes.
There is no easy formula to calculate the utilization, so we have tested
certain combinations which are officially supported maximums.  While a
different number of routes might work, it will not be a supported or
tested combination.

For CER:
256K IPv4 routes + 128K IPv6
448K IPv4 + 64K IPv6
512K IPv4 + 0 IPv6

For CER-RT:
1.5M IPv4 + 512K IPv6

"Internet route mix" is used to indicate that we are using a mix of prefix
lengths.  No compression is being used.

Greg
(works for Brocade)

-- 
Greg Hankins <ghankins at mindspring.com>

-----Original Message-----
Date: Wed, 3 Oct 2012 16:54:45 +0200
From: Robert Hass <robhass at gmail.com>
To: foundry-nsp at puck.nether.net
Subject: [f-nsp] CER FIB capacity

Hi
I know that CER (non-RT version) have FIB for 512K IPv4 / 128K IPv6.
My question is CAM is split between IPv4 and IPv6 - I mean if I have
128K IPv6 routes in FIB then I cannot have 512K IPv4 routes at same
time.

Rob
_______________________________________________
foundry-nsp mailing list
foundry-nsp at puck.nether.net
http://puck.nether.net/mailman/listinfo/foundry-nsp