Opened 7 years ago

Closed 7 years ago

Last modified 2 years ago

#5746 closed defect (fixed)

IXP4XX patch 304-ixp4xx_eth_jumboframe.patch cause packet lossage

Reported by: thess@… Owned by: developers
Priority: high Milestone: Barrier Breaker 14.07
Component: kernel Version: Trunk
Keywords: ixp4xx Cc:


The ixp4xx jumbo frame patch causes the default NPE MAXFRAMELENGTH to get set to 1500 instead of the Intel default of 1536. This is causing the interfaces to drop packets larger than 1482 bytes. The NPE MAXFRAMELENGTH must be at least the MTU size plus 18 bytes (ETH_HLEN + ETH_FCS_LEN) rounded up to 64-byte boundary. Also, the maximum allowable frame size is 16320 according to the Intel documentation.

Attached: Proposed replacement patch files for 2.6.28 and 2.6.30 configs.

Attachments (2)

304-ixp4xx_eth_jumboframe.patch (1.8 KB) - added by thess@… 7 years ago.
ixp4xx jumbo frame patch for 2.6.28
304-ixp4xx_eth_jumboframe.2.patch (1.8 KB) - added by Ted Hess <thess@…> 7 years ago.
ixp4xx jumbo frame patch for 2.6.30

Download all attachments as: .zip

Change History (4)

Changed 7 years ago by thess@…

ixp4xx jumbo frame patch for 2.6.28

Changed 7 years ago by Ted Hess <thess@…>

ixp4xx jumbo frame patch for 2.6.30

comment:1 Changed 7 years ago by nbd

  • Resolution set to fixed
  • Status changed from new to closed

applied in r17396, thanks!

comment:2 Changed 2 years ago by jow

  • Milestone changed from Attitude Adjustment 12.09 to Barrier Breaker 14.07

Milestone Attitude Adjustment 12.09 deleted

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