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charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: [dpdk-users] i40e VF link speed and link status while PF physical link is down X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Oct 2018 10:55:21 -0000 Hi, I have a VM using one SR-IOV VF of Intel XXV710 NIC (25GE) as ethernet port= . I want to understand what is the VF's link status and link speed will be= shown while PF physical link is down (unplug optical module). VF's link status is up or down? VF's link speed is unknown or 100Mbps? DPDK-16.11 is running in VM, driving i40evf device. In i40evf_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to= _complete) ... ... /* 2168 * DPDK pf host provide interfacet to acquire link status 2169 * while Linux driver does not 2170 */ 2171 2172 /* Linux driver PF host */ 2173 switch (vf->link_speed) { 2174 case I40E_LINK_SPEED_100MB: 2175 new_link.link_speed =3D ETH_SPEED_NUM_100M; 2176 break; 2177 case I40E_LINK_SPEED_1GB: 2178 new_link.link_speed =3D ETH_SPEED_NUM_1G; 2179 break; 2180 case I40E_LINK_SPEED_10GB: 2181 new_link.link_speed =3D ETH_SPEED_NUM_10G; 2182 break; 2183 case I40E_LINK_SPEED_20GB: 2184 new_link.link_speed =3D ETH_SPEED_NUM_20G; 2185 break; 2186 case I40E_LINK_SPEED_25GB: 2187 new_link.link_speed =3D ETH_SPEED_NUM_25G; 2188 break; 2189 case I40E_LINK_SPEED_40GB: 2190 new_link.link_speed =3D ETH_SPEED_NUM_40G; 2191 break; 2192 default: 2193 new_link.link_speed =3D ETH_SPEED_NUM_100M; 2194 break; 2195 } 2196 /* full duplex only */ 2197 new_link.link_duplex =3D ETH_LINK_FULL_DUPLEX; 2198 new_link.link_status =3D vf->link_up ? ETH_LINK_UP : 2199 ETH_LINK_DOWN; 2200 If PF physical link is down, what will be vf->link_speed? If it does not ma= tch any cases, if will fall to default case new_link.link_speed =3D ETH_SPE= ED_NUM_100M; I'm wondering if we could have 100Mbps link speed while PF link is down? And anyone could give commonts on /* 2168 * DPDK pf host provide interfacet to acquire link status 2169 * while Linux driver does not 2170 */ 2171 2172 /* Linux driver PF host */ Linux driver (on host) can't report link status to VF? Thanks, KeXu