On 08/27/2012 03:16 PM, jdow wrote:
> On 2012/08/27 14:37, Todd And Margo Chester wrote:
>> On 08/27/2012 01:57 PM, Carl Friedberg wrote:
>>
>>>> -----Original Message-----
>>>> From: [log in to unmask] [mailto:owner-
>>>> [log in to unmask]] On Behalf Of Todd And Margo
>>>> Chester
>>>> Sent: Monday, August 27, 2012 4:49 PM
>>>> To: Scientific Linux Users
>>>> Subject: jumbo frames?
>>>>
>>>> Hi All,
>>>>
>>>> Can anyone tell me what this means?
>>>>
>>>>       just disable jumbo frames on centos host interface
>>>>       ifcfg and ethernet switch.
>>>>
>>>> Many thanks,
>>>> -T
>>>
>>
>>  > Todd and Margo Chester:
>>  >
>>  >   I can give you some information.
>>  >
>>  > jumbo frames refer to a capability to send very large packets
>>  > over gigabit Ethernet (somewhere near 9,000 bytes), as
>>  > opposed to the traditional ~1500 byte packet size on
>>  > traditional Ethernet.
>>  >
>>  > This only works between two end-points if every switch
>>  > handling the frame/packet has jumbo frame capability
>>  > enabled.
>>  >
>>  > There have been instances (I've run into them, but not
>>  > on SL) where enabling jumbo frames can cause issues.
>>  >
>>  > So, since you didn't provide context on that piece of
>>  > advice,  I can't guess why they were suggesting
>>  > disabling jumbo frames.
>>  >
>>  > Typically, jumbo frames are disabled by default (but,
>>  > I don't know what the SL policy is).
>>  >
>>  > Carl
>>  >
>>  > Carl Friedberg
>>  > www.about.me/carl.friedberg
>>  > [log in to unmask]
>>  > www.comets.com
>>  > Problems Solved
>>  >
>>  >
>>
>> Where would I go to check on this?  Is there a utility?
>>
>
> ifconfig comes to mind.
> {^_^}
>

$ ifconfig virbr0
virbr0    Link encap:Ethernet  HWaddr 52:54:00:EB:2D:7B
           inet addr:192.168.122.1  Bcast:192.168.122.255 
Mask:255.255.255.0
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

What am I looking for?