UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 52027

Zynq-7000 AP SoC, GigE - Packets up to 1536 bytes are Allowed with VLAN Tagging

Description

The IEEE 802.3 specification states that the maximum size of a non-jumbo packet should be 1518 bytes. With VLAN tagging, this maximum size is raised to 1522 bytes. When the Receive 1536-Byte Frames bit is set, gem.NET_CFG[8] = 1, the controller allows up to 1536 bytes in the packet to be received when the controller should only allow up to 1522 bytes.

Solution

Impact:
Trivial. Some packets will be accepted that are larger than 1522 bytes.
Work-around:
None.
Configurations Affected:
Systems that use the GigE controller and want to define the packet size using the Receive 1536-Byte Frames bit..
Device Revision(s) Affected:
All. No plan to fix. Refer to (Xilinx Answer 47916) Zynq-7000 AP SoC Silicon Revision Differences Answer Record.

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
47916 Zynq-7000 AP SoC Devices - Silicon Revision Differences N/A N/A
AR# 52027
Date Created 01/31/2013
Last Updated 01/31/2013
Status Active
Type Design Advisory
Devices
  • Zynq-7000