From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wenzhuo Lu Subject: [PATCH v2 2/2] doc: announce ixgbe MTU setting limitation Date: Thu, 9 Feb 2017 09:28:00 +0800 Message-ID: <1486603680-62864-3-git-send-email-wenzhuo.lu@intel.com> References: <1486448555-95730-1-git-send-email-wenzhuo.lu@intel.com> <1486603680-62864-1-git-send-email-wenzhuo.lu@intel.com> Cc: Wenzhuo Lu To: dev@dpdk.org Return-path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id 0E44B2BAA for ; Thu, 9 Feb 2017 02:27:54 +0100 (CET) In-Reply-To: <1486603680-62864-1-git-send-email-wenzhuo.lu@intel.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Signed-off-by: Wenzhuo Lu --- doc/guides/nics/ixgbe.rst | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/doc/guides/nics/ixgbe.rst b/doc/guides/nics/ixgbe.rst index 05ecc2a..aceeb13 100644 --- a/doc/guides/nics/ixgbe.rst +++ b/doc/guides/nics/ixgbe.rst @@ -233,6 +233,15 @@ be calculated as follows: In order to ensure valid results, it is recommended to poll every 4 minutes. +MTU setting +~~~~~~~~~~~ + +Although the user can set the MTU separately on PF and VF ports, the ixgbe NIC +only supports one global MTU per physical port. +So when the user sets different MTUs on PF and VF ports in one physical port, +the real MTU for all these PF and VF ports is the largest value set. +This behavior is based on the kernel driver behavior. + Supported Chipsets and NICs --------------------------- -- 1.9.3