The number of vNICs and vHBAs that can be defined on virtual interface cards in the servers that are connected to FEX is dependent on what?
A. the number of HBA cards
B. the number of VSANs
C. the number of uplinks
D. the number of FEX devices
What?
I think the answer is C = the number of uplinks
Tricky answer given the number of uplinks determine max VIF and the number of uplinks are directly related to the number of FEX. Example: QTY=1 2204, 4 Ports / QTY=2 2204IOM, 8 ports.
I’d personally answer C because it doesn’t matter how many FEX you have unless you physically wire them.
Maximum Configurable vNICs/vHBAs Based on Number of FEX Uplinks
https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/c-series_integration/ucsm3-2/b_C-Series-Integration_UCSM3-2/b_C-Series-Integration_UCSM3-2_chapter_01.html
The number of VIFs per blade is limited by the most restrictive item in the following list:
– the network connectivity from chassis I/O Module (IOM) to Fabric Interconnect;
– the Adapter VN-Tag namespace;
– the OS/BIOS version.
https://vmguru.com/2012/08/cisco-ucs-whats-maximum-number-of-vifs-per-blade/
The following variables affect the number of VIFs available to a blade server, and therefore, how many vNICs and vHBAs you can configure for a service profile.
– Maximum number of VIFs supported on your fabric interconnect
– How the fabric interconnects are cabled
– If your fabric interconnect and IOM are configured in fabric port channel mode
https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/ucs-manager/GUI-User-Guides/Infrastructure-Mgmt/3-1/b_UCSM_GUI_Infrastructure_Management_Guide_3_1/b_UCSM_GUI_Infrastructure_Management_Guide_3_1_chapter_0101.html
The following variables affect the number of VIFs available to a blade server, and therefore, how many vNICs and vHBAs you can configure for a service profile.
– Maximum number of VIFs supported on your fabric interconnect
– How the fabric interconnects are cabled
– If your fabric interconnect and IOM are configured in fabric port channel mode
https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/ucs-manager/GUI-User-Guides/Infrastructure-Mgmt/3-1/b_UCSM_GUI_Infrastructure_Management_Guide_3_1/b_UCSM_GUI_Infrastructure_Management_Guide_3_1_chapter_0101.html
The number of VIFs per blade is limited by the most restrictive item in the following list:
– the network connectivity from chassis I/O Module (IOM) to Fabric Interconnect;
– the Adapter VN-Tag namespace;
– the OS/BIOS version.
https://vmguru.com/2012/08/cisco-ucs-whats-maximum-number-of-vifs-per-blade/