HP Virtual Connect Flex-10/10D Module Enterprise Edition for BLc7000 HP Virtua - Page 146

Device Port 2 MEZ2 1 2 Type NC551m NC551m NC551m VC Connections Assigned Enet 4, FCoE 4, Enet 10 Enet 5, iSCSI 1 Enet 6, iSCSI (PF disabled) Bandwidth assignment In Flex-10 environments, four FlexNICs must share a single 10Gb link. Each FlexNIC is allocated a portion of that 10Gb link's bandwidth. The bandwidth assigned to the four FlexNICs in a single physical port cannot exceed 10Gb, but the requested bandwidth settings you specified in the profile might exceed 10Gb. Each FlexNIC is assigned a bandwidth value that is a portion of a 10Gb link. A 10Gb NIC might not be able to saturate a 10Gb link, so FlexNIC bandwidth is limited to a proportion of the NIC's actual throughput. For example, a FlexNIC that is assigned a requested bandwidth value of 5Gb might not be able to achieve a full 5Gb of throughput, but that FlexNIC is allocated half of the NIC's actual throughput. Requested bandwidth is translated to assigned bandwidth with the following rules: 1. FlexNICs with a "preferred" or "custom" value for requested bandwidth receive their allocated bandwidth first. For example, if the requested bandwidth setting for the four FlexNICs on a given port are all 2Gb, then each FlexNIC can be assigned 2Gb of bandwidth. FlexNIC a FlexNIC b FlexNIC c FlexNIC d Requested 2Gb 2Gb 2Gb 2Gb Allocated 2Gb 2Gb 2Gb 2Gb 2. After bandwidth is allocated in rule 1 above, FlexNICs with an "Auto" value for the requested bandwidth divide the remaining bandwidth evenly. For example, if the requested bandwidth setting for the four FlexNICs on a given port are 1Gb, Auto, Auto, and Auto, then the first FlexNIC is assigned 1Gb (as per rule 1) and the other three FlexNICs divide the remaining 9Gb evenly (3Gb each). There might be some cases where the bandwidth does not divide evenly because VCM assigns bandwidth in increments of 100Mb. Connections with a "preferred" setting to a network where no preferred speed has been defined are treated as a connection set to "auto". FlexNIC a FlexNIC b FlexNIC c FlexNIC d Requested 1Gb Auto Auto Auto Allocated 1Gb 3Gb 3Gb 3Gb In cases where the requested bandwidth settings you specified for the four FlexNICs in a single physical port exceed 10Gb, the following rules are applied in this order: 1. If FlexNICs with a "preferred" or "custom" value for requested bandwidth exceed 10Gb, each FlexNIC is allocated bandwidth proportional to its requested bandwidth setting. For example, if four FlexNICs on a given port have requested bandwidth settings of 1Gb, 2Gb, 4Gb, and 5Gb, their allocated bandwidth is as shown in the table below. In this example, 200Mb remains after dividing the 10Gb link. 100Mb is added to the two connections with the least bandwidth. Virtual Connect server profiles 146