hello
I have B200M5 servers in the same 5108 chassis UCS 4.0(1d)
B200M5 include 2 VICs : MLOM1340 with 1380
Each one of twice VICS have a 2-port 40-Gbps Ethernet or dual 4 x 10-Gbps Ethernet, Fibre Channel over Ethernet (FCoE)-capable.
When I have installed vmware esxi on the server I'm found 20Gbps per vNic.
How can I solve this problem to have full 40Gbps per vNic ?
Thank you.
this is screen capture from Esxi :
when I have checked the inventory panel
I see that the vNic1 "vmnic0" is mapped to the vic card 1340 it is normal that the speed of the card is 20gb because there is no port expander installed.
but for the second vNic2 "vmnic1" it is mapped to the vic card 1380 and the speed it's the same as you can see.
- What IOM do you have installed?
- What fabric interconnect are you using.
Here is a simple diagram of how the VIC1340/VIC 1380 combo works. You effectively have a single 20G (2x10G) port channel between each FI and each adapter (1340/1380)
You need the port expander to get native 40G, assuming you meet other requirements upstream (IOM, FI, etc)
What IOM do you have installed?
-UCS 2304XP I/O Module (4 External, 8 Internal 40Gb Ports)
What fabric interconnect are you using?
-FI6332-16UP
it's ok for the VIC1340 the maximum bandwidth 20GB per FI because there is no port expander.
but for the VIC1380 is a native dual-port 40-Gbps Ethernet.
if i'm understand the architecture that you present it must be like this:
why i can't have 40GB on a vNic2 that is mapped to VIC1380 native dual-port 40-Gbps ?
Unfortunately that is not how the architecture works. If you use only the VIC 1380, you would have 4x10G Po to each Fabric A/B. This is on older blade models. B200-M5 requires MLOM.
As stated previously, you have 2x10G Po from each adapter to each FI with VIC1340/VIC1380. You need the port expander for native 40G.
The B200-M5, you are not able to only use a single VIC 1380, the MLOM is required. So the only way to achieve 40G is with the port expander. Apologies for confusion on my previous post. You are only able to use single VIC1380 on different blade models.
