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August 2012

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Subject:
Re: jumbo frames?
From:
Todd And Margo Chester <[log in to unmask]>
Reply To:
Todd And Margo Chester <[log in to unmask]>
Date:
Mon, 27 Aug 2012 15:36:30 -0700
Content-Type:
text/plain
Parts/Attachments:
text/plain (46 lines) 
On 08/27/2012 03:16 PM, Alec T. Habig wrote:
> Todd And Margo Chester writes:
>>
>> Where would I go to check on this?  Is there a utility?
>
> # ifconfig eth0
> eth0      Link encap:Ethernet  HWaddr 00:E0:81:B2:10:D7
>            inet addr:131.212.37.6  Bcast:131.212.37.255  Mask:255.255.255.0
>            UP BROADCAST RUNNING MULTICAST  MTU:9000  Metric:1
>            RX packets:6914505 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:3983544 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:1000
>            RX bytes:6511170177 (6.0 GiB)  TX bytes:1440910442 (1.3 GiB)
>            Interrupt:18 Memory:c4200000-c4220000
>
> The MTU 9000 says it's on for me on this interface.
>
> # ifconfig eth2
> eth2      Link encap:Ethernet  HWaddr 00:E0:29:85:EF:AD
>            inet addr:192.168.2.1  Bcast:192.168.2.255  Mask:255.255.255.0
>            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>            RX packets:138324 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:201726 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:1000
>            RX bytes:18886234 (18.0 MiB)  TX bytes:154781925 (147.6 MiB)
>            Interrupt:20 Base address:0x6000
>
> in here, MTU's only 1500, so no jumbo frames.
>


Hi Alex,

$ 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)

It is the MTU, so no jumbo frames.  Thank you!

-T

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