From mboxrd@z Thu Jan 1 00:00:00 1970 From: "John Daley (johndale)" Subject: Re: [opnfv-tech-discuss][apex][ovsnfv]Problem showed up with OVS/DPDK with Cisco VIC adapter Date: Thu, 20 Oct 2016 18:49:19 +0000 Message-ID: <495528db51e64f80a59348734a217a6c@XCH-RCD-007.cisco.com> References: <2986fc44-b2a1-f58c-62e0-eaf238a4fe08@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Cc: Keith Burns , Edward Warnicke , "opnfv-tech-discuss@lists.opnfv.org" To: Thomas F Herbert , "dev@dpdk.org" Return-path: Received: from rcdn-iport-2.cisco.com (rcdn-iport-2.cisco.com [173.37.86.73]) by dpdk.org (Postfix) with ESMTP id C0B7F29D2 for ; Thu, 20 Oct 2016 20:49:21 +0200 (CEST) In-Reply-To: <2986fc44-b2a1-f58c-62e0-eaf238a4fe08@redhat.com> Content-Language: en-US List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Hi, Please see inline. Thanks, john > -----Original Message----- > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Thomas F Herbert > Sent: Tuesday, October 18, 2016 1:35 PM > To: dev@dpdk.org > Cc: Keith Burns ; Edward Warnicke > ; opnfv-tech-discuss@lists.opnfv.org > Subject: [dpdk-dev] [opnfv-tech-discuss][apex][ovsnfv]Problem showed up > with OVS/DPDK with Cisco VIC adapter >=20 > All: >=20 > This is not necessarily related to VPP but rather to OVS/DPDK. > In OPNFV we found the following problem when using UCS NIC. > The UCS fabric seems to set a VLAN tag on untagged packets. > Any thoughts from DPDK and VPP folks would be appreciated. >=20 In a UCS fabric, all frames between the VIC and the Fabric Interconnect wil= l be tagged. This is required to carry both VLAN information and, being a c= onverged adapter supporting both Ethernet and FCoE, traffic class. For non-= UCS fabric deployments, there is currently no way to turn off egress priori= ty tagging on the VIC adapter. If a packet being sent from DPDK to the enic= PMD is priority tagged (VLAN=3D0) or has no VLAN tag, the default VLAN tag= (as set up in CIMC/UCSM manager) will be inserted. This should only be an= issue with C-series UCS servers connected point to point or through a swit= ch that can't cope with priority tags. Is that the case here? > ... > -- > *Thomas F Herbert* > SDN Group > Office of Technology > *Red Hat*