recommendations on supported 40GbE adapters?

[John Jasen]

Hello -- frequent listener, first time caller. If this should be
redirected to another freebsd-* mailing list, please let me know.

I've been experimenting with multiple dual port Mellanox adapters in a
system, to see if the entire solution would be suitable for a router
replacement project I'm doing.

In general, I've been impressed with the Mellanox drivers and their
responsiveness, however, I have encountered a few issues where the cards
seem to 'fall asleep' or, when I'm playing with the sysctl settings for
the mlxen drivers, I panic the kernel.

Of course, before I finish spec'ing out a solution to be purchased, I
should solicit real-world feedback on the available 40GbE adapters and
drivers.

>From what I've gleaned, Mellanox, Emulex, and Chelsio all support the
development of FreeBSD drivers for their 40GbE cards. Are there any
other vendors I should be considering?

If anyone else has tried 40GbE cards, I am most interested in your
experiences -- especially in stability, performance and performance tuning.

Thanks in advance!

-- John Jasen (jjasen at gmail.com)