Re: network bridge default MTU -- apparent change (SOLVED)

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On 03/18/2010 11:53 AM, Joe Conway wrote:
> On 03/17/2010 05:49 PM, Joe Conway wrote:
>> On 03/17/2010 05:44 PM, Tom Horsley wrote:
>>> On Wed, 17 Mar 2010 17:28:42 -0700
>>> Joe Conway wrote:
>>>
>>>> A bit more sleuthing and I found that the culprit is dhclient. I am
>>>> using a dynamically assigned address (pinned to a static IP at my dhcp
>>>> server), and I bet you are not. A downgrade makes the problem go away:
>>>
>>> My host machine is using a static IP, but it is the dhcp server
>>> for my other machines (including my virtual machines), so I guess
>>> dhclient isn't involved on my host, just in the guests.
>>
>> Yes, I'm using dhclient for my host as well. I guess I could just switch
>> to a static IP for my host as a workaround.
>
> For the sake of posterity, an explanation of the root cause and a
> solution can be found here:
>
>    https://bugzilla.redhat.com/show_bug.cgi?id=574629

Thank you _ever_ so much for posting that.  I've been trying to figure out
why on earth my Comcast broadband connection kept getting stuck with 576
for the MTU.  The Comcast DHCP server must have been recalling that from
an old lease, because my FC-12 laptop would get an MTU of 1500 but my
FC-12 desktop kept getting 576 (connecting each directly to the modem).

Happy at MTU=1500 now.

-- 
Bob Nichols     "NOSPAM" is really part of my email address.
                 Do NOT delete it.

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