Re: Jumbo frames on Octeon
On 29/06/2017 12:06, Visa Hankala wrote: > On Tue, Jun 27, 2017 at 07:57:42PM +0100, Joe Holden wrote: >> It looks like setting the mtu on cnmac interfaces doesn't quite work as >> expected, whatever the mtu is set to the upper limit appears to be 1510 >> as although it will transmit frames of any arbitary size (e.g 2000 >> bytes), the reply never makes it back (confirmed from an attached box) >> unless the frame is =< 1510. > I just committed a patch that lets MTU change happen on the fly > with cnmac(4). > > If you are using release 6.1, you have to temporarily bring down > the interface, or reboot, when changing MTU on a cnmac(4) interface. > Ah excellent, cheers!
Re: Jumbo frames on Octeon
On Tue, Jun 27, 2017 at 07:57:42PM +0100, Joe Holden wrote: > It looks like setting the mtu on cnmac interfaces doesn't quite work as > expected, whatever the mtu is set to the upper limit appears to be 1510 > as although it will transmit frames of any arbitary size (e.g 2000 > bytes), the reply never makes it back (confirmed from an attached box) > unless the frame is =< 1510. I just committed a patch that lets MTU change happen on the fly with cnmac(4). If you are using release 6.1, you have to temporarily bring down the interface, or reboot, when changing MTU on a cnmac(4) interface.
Re: Jumbo frames on Octeon
On 27/06/2017 19:57, Joe Holden wrote: > Hi guys, > > It looks like setting the mtu on cnmac interfaces doesn't quite work as > expected, whatever the mtu is set to the upper limit appears to be 1510 > as although it will transmit frames of any arbitary size (e.g 2000 > bytes), the reply never makes it back (confirmed from an attached box) > unless the frame is =< 1510. > > Not sure who looks after octeon these days > > Cheers > Should probably note, observed on ERL
Jumbo frames on Octeon
Hi guys, It looks like setting the mtu on cnmac interfaces doesn't quite work as expected, whatever the mtu is set to the upper limit appears to be 1510 as although it will transmit frames of any arbitary size (e.g 2000 bytes), the reply never makes it back (confirmed from an attached box) unless the frame is =< 1510. Not sure who looks after octeon these days Cheers
