On Thu, 14 Aug 2025 11:04:18 +0200
Morten Brørup <m...@smartsharesystems.com> wrote:

> > From: sk...@marvell.com [mailto:sk...@marvell.com]
> > Sent: Thursday, 14 August 2025 10.10
> > 
> > Adding link type parameter to provide the type
> > of port like twisted pair, fibre etc.
> > 
> > Also added an API to convert the RTE_ETH_LINK_TYPE_XXX
> > to a readable string.  
> 
> Please consider if "connector" is a better name than "link type", if this is 
> related to physical interfaces only.
> E.g. is there an "LACP" link type for link aggregates (bonded links)?
> 
> Also, should a "virtual" link type (or connector) be added for 
> TAP/Virtio/VMXNET3/ring and similar non-physical interfaces?
> 
> More comments inline below.

My preference is that a new feature like this follow what other commands and 
standards do.
There is Linux ethtool as the most common example.
Also, there is probably something IEEE standard but that is behind stupid 
paywall.

Ethtool on real NIC.
# ethtool enp87s0
Settings for enp87s0:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
                                2500baseT/Full
        Supported pause frame use: Symmetric
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
                                2500baseT/Full
        Advertised pause frame use: Symmetric
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Speed: 2500Mb/s
        Duplex: Full
        Auto-negotiation: on
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: internal
        MDI-X: off (auto)
        Supports Wake-on: pumbg
        Wake-on: g
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: yes

And on virtio
# ethtool enp1s0
Settings for enp1s0:
        Supported ports: [  ]
        Supported link modes:   Not reported
        Supported pause frame use: No
        Supports auto-negotiation: No
        Supported FEC modes: Not reported
        Advertised link modes:  Not reported
        Advertised pause frame use: No
        Advertised auto-negotiation: No
        Advertised FEC modes: Not reported
        Speed: Unknown!
        Duplex: Unknown! (255)
        Auto-negotiation: off
        Port: Other
        PHYAD: 0
        Transceiver: internal
        Link detected: yes

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