| To: | Jon Mason <jdmason@xxxxxxxxxx> |
|---|---|
| Subject: | Re: r8169 802.1q/MTU bug |
| From: | Francois Romieu <romieu@xxxxxxxxxxxxx> |
| Date: | Wed, 1 Jun 2005 01:44:58 +0200 |
| Cc: | James Harr <james@xxxxxxxxxxx>, netdev@xxxxxxxxxxx |
| In-reply-to: | <200505311820.41469.jdmason@us.ibm.com> |
| References: | <20050530071148.GB1514@electric-eye.fr.zoreil.com> <200505301927.26110.james@grickle.org> <200505311820.41469.jdmason@us.ibm.com> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
| User-agent: | Mutt/1.4.1i |
Jon Mason <jdmason@xxxxxxxxxx> : [...] > I wonder if this is related to the adapter breaking large frames into > multiple descriptors. On normal (non-VLAN) frames, this happens at MTU > 8169. I wonder if enabling VLAN and jumbo frames (a combination I never > tried) brings down the threshold to MTU 7200. Testing suggests that there is at least a size filtering issue (fixed in netdev-2.6.git but not in 2.6.11.xx nor in 2.6.12-rc). It is unrelated to hardware vlan support and happens a few bytes above the MTU on the vlan device (which is set to the same value as the adapter). Of course different issues could hide in the dark. -- Ueimor |
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