igb statistics error
beezarliu
beezarliu at yahoo.com.cn
Wed Jul 21 06:21:59 UTC 2010
It's hard to believe it's switch's problem or unicast issue,
because all the 82576/82571 NICs are on the same switch.
I even have done a testing.
I put one 82571 and one 82576 card in the same machine. And all of the
NICs are plugged into a same switch. And they are not configued
any IP address, to exclude the unicast issue.
And I found the same result.
82576's tpr > 82578's gprc = 82571's tpr = 82571's gprc.
So I'm really curious about the TPR. Is the meaning/implementation
changed for 82576?
Thanks
2010-07-21
beezarliu
发件人: Ryan Stone
发送时间: 2010-07-20 22:41:20
收件人: beezarliu
抄送: freebsd-net; Jack Vogel
主题: Re: Re: igb statistics error
The extra packets counted in tpr are packets received by the interface
that were not addressed to that interface. The fact that your machine
with a 82571 has not seen any such packets is just a coincidence.
Whatever switch that machine is connected to has happened not to have
flooded unicast packets to an unknown destination in the time that the
machine has been up.
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