The third example is similar to the second except that the LOM is the NC551i. The example compares ten Ethernet, one iSCSI, and four FCoE connections. The second PF on MEZZ2:Port 2 has to be enumerated as iSCSI since the corresponding PF on port 1 is iSCSI. But, since there is only one iSCSI connection defined in the Profile, the second PF on MEZZ2:Port 2 is disabled.

Device

Port

Type

VC Connections Assigned

 

 

 

 

LOM

1

NC551i

Enet 1, FCoE 1, Enet 7

 

2

NC551i

Enet 2, FCoE 2, Enet 8

 

 

 

 

MEZ1

1

NC551m

Enet 3, FCoE 3, Enet 9

 

2

NC551m

Enet 4, FCoE 4, Enet 10

 

 

 

 

MEZ2

1

NC551m

Enet 5, iSCSI 1

 

2

NC551m

Enet 6, iSCSI (PF disabled)

 

 

 

 

Bandwidth assignment

In Flex-10 environments, four FlexNICs must share a single 10Gb link or 20Gb link when using Flex-10/20 Adapters together with FlexFabric-20/40 F8 modules. Each FlexNIC is allocated a guaranteed portion of that 10Gb or 20Gb link's bandwidth and can transmit up to 10Gb or 20Gb. The network adapter automatically adjusts the FlexNIC port speed between the guaranteed minimum speed and the maximum speed based on the server's transmit demand and unutilized physical port bandwidth.

Each FlexNIC is assigned two port speeds: minimum and maximum. The requested bandwidth is translated to a minimum allocated speed. The sum of the minimum allocated speed assigned to the four FlexNICs in a single physical port is equal to10Gb, but the requested bandwidth settings specified in the profile might exceed 10Gb. For all requested bandwidth settings, the maximum allocated speed is determined by the maximum configured speed for the network or fabric. For example, FlexNIC a and b are assigned a minimum port speed of 5Gb and a maximum port speed of 10Gb. When one of the FlexNICs does not use the port bandwidth or does not achieve the minimum 5Gb actual throughput, the other FlexNIC can use the unused bandwidth, up to 10Gb or 20Gb.

Requested bandwidth is translated to the minimum allocated speed 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.

 

 

 

 

 

 

RequestedAllocated

 

 

 

 

 

FlexNIC a

2Gb

2Gb

 

FlexNIC b

2Gb

2Gb

 

FlexNIC c

2Gb

2Gb

 

FlexNIC d

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".

 

 

 

 

 

 

Requested

Allocated

 

 

 

 

 

 

Virtual Connect server profiles 175