I read the discussion under the topic:
BCM5708 (bnx) and MTU 9000 (jumbo-frames)
Posted: Apr 15, 2008 2:21 PM
To: Communities » networking » discuss
http://www.opensolaris.org/jive/thread.jspa?messageID=227091𷜓
and was hoping this was my answer, but unfortunately not.
SCANPCI output: pci bus 0x000e cardnum 0x00 function 0x00: vendor 0x14e4 device
0x164c
Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet
[b]bnx2[/b]: flags=201000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,CoS>
[b]mtu[/b] 1500 index 4
inet 192.168.1.20 netmask ffffff00 broadcast 192.168.1.255
ether 0:1e:c9:d5:75:d2
So I know that this particular Broadcom card is capable of doing Jumbo frames.
I read in the Sun website:
http://docs.sun.com/app/docs/doc/819-2254/bnx-7d?a=view that Jumbo frames can
be set to 3800, is this correct?
However, in the above mentioned thread, the original poster was able to
establish a 9000 MTU based on SNV_90.
I'm running Opensolaris SNV_99 with the built in BNX drivers from Sun.
I've attempted to configure the /kernel/drv/bnx.conf file with the available
options.
mtu = 9000;
or
Jumbo = 9000;
or
default_mtu = 9000;
or
mtu=9000,9000,9000,...,9000,9000 (repeated 13 times)
or
jumbo=9000,...,9000
And still I continue to be unsuccessful in achieving an MTU setting of 9000 (or
3800 for that matter.)
The reason for the high MTU setting is to get the iscsi to communicate with my
VMWare ESX hosts at 9000 MTU.
The Cisco 3560G switch has been enabled for jumbo frames and is working
properly since I was able to configure another solaris box with the NGE
(Nvidia) adapted to 9000 MTU.
Any insights to this issue would be greatly appreciated!
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