ath using hostap sets MTU to 2290
John T. Yocum
jtyocum at publicmx.com
Wed Jul 30 03:28:19 UTC 2008
Quoting Sam Leffler <sam at freebsd.org>:
> John T. Yocum wrote:
>> I have a system running pfSense, which is built on top of FreeBSD
>> 7.0-RELEASE-p3. In the system I have an Atheros wireless card,
>> which when I enable hostap, changes it's MTU to 2290. If an
>> explanation is listed on a man page, I apologize, I did try
>> Any ideas why this might happen? It doesn't appear to be a pfSense
>> issue, as it appears their code actually tries to set the MTU to
>> Only reason I ask here, is I noticed in my searching on Google, I
>> noticed others that aren't running pfSense have their MTU set to
> MTU on an 802.11 network is 2290. If you don't want the default
> then change it. If you cannot then please provide the exact steps
> you take that do not work.
Thank you, I didn't realize that the default MTU was 2290. At the
moment, I am manually changing it to 1500, so I can setup a bridge
between wired, and wireless.
I'm curious, are there some Atheros cards or chipsets that only
support an MTU of 1500? I only ask, as it seems that some people don't
need to manually set the MTU to 1500.
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