Bug 1267044 - Ethernet network slow / TCP retransmits / Large frames [module: e1000e]
Summary: Ethernet network slow / TCP retransmits / Large frames [module: e1000e]
Keywords:
Status: CLOSED WORKSFORME
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2015-09-28 23:23 UTC by Andreas Gruenbacher
Modified: 2015-09-29 21:00 UTC (History)
6 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2015-09-29 21:00:39 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)
Traffic to the problematic node A (deleted)
2015-09-28 23:23 UTC, Andreas Gruenbacher
no flags Details
Traffic from the problematic node A (128.74 KB, application/octet-stream)
2015-09-28 23:24 UTC, Andreas Gruenbacher
no flags Details

Description Andreas Gruenbacher 2015-09-28 23:23:55 UTC
Description of problem:
I'm having severe network performance problems when copying files to an Intel NUC with an "Intel Corporation Ethernet Connection (3) I218-V (rev 03)" Ethernet controller. When copying files to this node ("node a"), the remote side ("node b") decides to send large frames and the node rejects them, leading to inane amounts of retransmits. When copying files from node A to node B, node A also sends large frames, but node B accepts them.

I'm seeing the problem with different B nodes which are connected by switches (I have tried two different switches). When node B is connected through a router, the frame size apparently stays small and the problem doesn't trigger.

The MTU side on both sides is set to the standard 1500 bytes.

Version-Release number of selected component (if applicable):
Fedora 23 Beta 1

How reproducible:
Always

Actual results:
Huge amounts of retransmits, abysmal network performance.

Expected results:
No retransmits, normal network performance.

Comment 1 Andreas Gruenbacher 2015-09-28 23:24:44 UTC
Created attachment 1078085 [details]
Traffic from the problematic node A

Comment 2 Andreas Gruenbacher 2015-09-29 21:00:39 UTC
Weird, I cannot reproduce the bug anymore, and I'm not sure what made it go away. I'm closing this bug for now.


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