That is not an easy answer.

In the world of UCS, there are several factors that can affect this:

1) Type of IOM (I/O Module)

2) Port config of the IOM (single link or port-channel)

3) Number of inks from the Fabric Interconnect to said IOM

4) Model of adapter in the blade.

Depending on the combination of these things, it can be a 10, 20, or 40 GB
link.

On Wed, Jun 3, 2020, 9:40 PM Lee Trager <1881...@bugs.launchpad.net>
wrote:

> MAAS 2.7 introduced network testing. As part of network testing we added
> the following features which require accurate interface and link speed
> information.
>
> 1. The interface and uplink speeds are now shown in the API and over the
> UI.
> 2. MAAS now warns when an interface is connected to an uplink which is
> slower than its maximum supported speed.
> 3. Users may now acquire machines based on its uplink speed.
>
> I could stop verifying that link speed >= max interface speed however
> that will mean 1 is incorrect and 2 is broken. I understand that some
> interfaces achieve higher speeds by using more physical ports but
> neither ethtool nor LXD give any information on this.
>
> Does anyone know the proper way to calculate the maximum supported
> interface speed on a device like this?
>
> ** Summary changed:
>
> - Kernel does not report interface speed correctly for Cisco UCS B200 M5
> blade
> + MAAS does not properly detect max interface speed for interfaces which
> use multiple phyiscal ports(Cisco UCS B200 M5 blade)
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1881821
>
> Title:
>   MAAS does not properly detect max interface speed for interfaces which
>   use multiple phyiscal ports(Cisco UCS B200 M5 blade)
>
> Status in MAAS:
>   Triaged
> Status in MAAS 2.7 series:
>   Triaged
> Status in MAAS 2.8 series:
>   Triaged
> Status in linux package in Ubuntu:
>   Confirmed
>
> Bug description:
>   MAAS 2.7.1
>   Ubuntu 18.04.4
>
>   When attempting to commission a Cisco UCS B200 M5 blade, the
>   commissioning finishes (if smartctl-validate is disabled), however on
>   the machine in question in the Networking tab, it only shows 2 nics,
>   eth0 and eth1.  and shows no storage.
>
>   Going to SSH in the middle of commissioning, running lshw shows all 10
>   NICs, and the disk of the proper size.
>
>   This is causing the buckets.yaml for FCE to be inaccurate, and thus
>   cannot write a bucketsconfig.yaml since the actual devices don't show
>   up.
>
>   This was tried with bionic {ga,hwe,hwe-edge} and focal ga kernels for
>   commissioning, all have the same behavior.
>
>   I was previously hitting this bug
>   https://bugs.launchpad.net/maas/+bug/1878643 but applied the fix from
>   comment #10, and am no longer getting any commissioning errors.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/maas/+bug/1881821/+subscriptions
>

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1881821

Title:
  MAAS does not properly detect max interface speed for interfaces which
  use multiple phyiscal ports(Cisco UCS B200 M5 blade)

To manage notifications about this bug go to:
https://bugs.launchpad.net/maas/+bug/1881821/+subscriptions

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