How to view Ethernet speed - not showing up in ifconfig

W

wafliron

Dabbler
Joined
Aug 25, 2016
Messages
13
I have an instance of FreeNAS 11.2 running inside a VM on an ESXi 6.7 host. The VM has 3 x VMXNET3 vNICs.

I'm trying to determine what link speed the vNICs are running at (trying to track down a network performance issue, and want to rule out incorrect link speed).

All documentation I can find suggests the link speed should be displayed at the end of the "media:" line when I execute ifconfig. But, when I do this, all I see for the vNICS is:

media: Ethernet autoselect

Am I missing something? Or is link speed not available / not applicable with VMXNET3 vNICs on FreeNAS?

Thanks.
 
W

wafliron

Dabbler
Joined
Aug 25, 2016
Messages
13
Output as follows:

Code:
vmx0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 9000
        options=60039b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,TSO6,RXCSUM_IPV6,TXCSUM_IPV6>
        ether 00:0c:29:4a:e5:24
        hwaddr 00:0c:29:4a:e5:24
        inet 192.168.3.21 netmask 0xffffff00 broadcast 192.168.3.255
        nd6 options=9<PERFORMNUD,IFDISABLED>
        media: Ethernet autoselect
        status: active
vmx1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 9000
        options=60039b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,TSO6,RXCSUM_IPV6,TXCSUM_IPV6>
        ether 00:0c:29:4a:e5:2e
        hwaddr 00:0c:29:4a:e5:2e
        inet 192.168.4.10 netmask 0xffffff00 broadcast 192.168.4.255
        nd6 options=9<PERFORMNUD,IFDISABLED>
        media: Ethernet autoselect
        status: active
vmx2: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=60039b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,TSO6,RXCSUM_IPV6,TXCSUM_IPV6>
        ether 00:0c:29:4a:e5:1a
        hwaddr 00:0c:29:4a:e5:1a
        inet 192.168.2.31 netmask 0xffffff00 broadcast 192.168.2.255
        nd6 options=9<PERFORMNUD,IFDISABLED>
        media: Ethernet autoselect
        status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
        inet 127.0.0.1 netmask 0xff000000
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
        groups: lo


Thanks.
 
M

majorgear

Dabbler
Joined
Mar 13, 2012
Messages
36
wafliron said:
Output as follows:

Code:
vmx0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 9000
        options=60039b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,TSO6,RXCSUM_IPV6,TXCSUM_IPV6>
        ether 00:0c:29:4a:e5:24
        hwaddr 00:0c:29:4a:e5:24
        inet 192.168.3.21 netmask 0xffffff00 broadcast 192.168.3.255
        nd6 options=9<PERFORMNUD,IFDISABLED>
        media: Ethernet autoselect
        status: active
vmx1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 9000
        options=60039b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,TSO6,RXCSUM_IPV6,TXCSUM_IPV6>
        ether 00:0c:29:4a:e5:2e
        hwaddr 00:0c:29:4a:e5:2e
        inet 192.168.4.10 netmask 0xffffff00 broadcast 192.168.4.255
        nd6 options=9<PERFORMNUD,IFDISABLED>
        media: Ethernet autoselect
        status: active
vmx2: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=60039b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,TSO6,RXCSUM_IPV6,TXCSUM_IPV6>
        ether 00:0c:29:4a:e5:1a
        hwaddr 00:0c:29:4a:e5:1a
        inet 192.168.2.31 netmask 0xffffff00 broadcast 192.168.2.255
        nd6 options=9<PERFORMNUD,IFDISABLED>
        media: Ethernet autoselect
        status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
        inet 127.0.0.1 netmask 0xff000000
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
        groups: lo


Thanks.
Click to expand...
I have the same issue. did you every figure it out? I have a 1G and a 10G link on my serves, and I'm trying to figure out which is which! I don't even have "media" in the output ( TN Scale v23.10.1 )


ifconfig
eno2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
ether 2c:f0:5d:92:c6:9a txqueuelen 1000 (Ethernet)
RX packets 8105 bytes 541809 (529.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 14 bytes 1172 (1.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 16 memory 0xa2400000-a2420000

enp1s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.51 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::a236:9eff:fe25:8ac7 prefixlen 64 scopeid 0x20<link>
ether a0:36:9e:25:8a:c7 txqueuelen 1000 (Ethernet)
RX packets 1367365293 bytes 2034144574822 (1.8 TiB)
RX errors 0 dropped 29185 overruns 0 frame 0
TX packets 375259494 bytes 172848432254 (160.9 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Click to expand...
 
Patrick M. Hausen

Patrick M. Hausen

Hall of Famer
Joined
Nov 25, 2013
Messages
7,776
@wafliron, vmxnet NICs don't have a link speed. They are connected to a virtual switch and will go as fast as VMware ESXi, FreeBSD, and your hardware can manage. Look at the ESXi UI to determine the link speed of your physical NICs.

@majorgear, your problem is different and Linux related. Their ifconfig is a deprecated piece of garbage. IIRC the command you are looking for is ethtool.
 
M

majorgear

Dabbler
Joined
Mar 13, 2012
Messages
36
Patrick M. Hausen said:
@wafliron, vmxnet NICs don't have a link speed. They are connected to a virtual switch and will go as fast as VMware ESXi, FreeBSD, and your hardware can manage. Look at the ESXi UI to determine the link speed of your physical NICs.

@majorgear, your problem is different and Linux related. Their ifconfig is a deprecated piece of garbage. IIRC the command you are looking for is ethtool.
Click to expand...
I tried ethtool -m eno2 | grep Speed first since I use that all the time at work. However, "command not found"
 
Patrick M. Hausen

Patrick M. Hausen

Hall of Famer
Joined
Nov 25, 2013
Messages
7,776
Are you logged in as root? Try /sbin/ethtool or /usr/sbin/ethtool ...
 
M

majorgear

Dabbler
Joined
Mar 13, 2012
Messages
36
It was in /sbin/ethtool . It wasn't supported for the motherboard NIC, but the slotted NIC output quite a bit. I'm used to looking for "Speed" on the servers at work but my 10GBe card didn't output that metric.

/sbin/ethtool -m enp1s0
Identifier : 0x03 (SFP)
Extended identifier : 0x04 (GBIC/SFP defined by 2-wire interface ID)
Connector : 0x23 (No separable connector)
Transceiver codes : 0x01 0x00 0x00 0x04 0x41 0x84 0x80 0xd5 0x00
Transceiver type : Infiniband: 1X Copper Passive
Transceiver type : Ethernet: 1000BASE-CX
Transceiver type : FC: short distance (S)
Transceiver type : FC: Electrical inter-enclosure (EL)
Transceiver type : FC: Electrical intra-enclosure (EL)
Transceiver type : Passive Cable
Transceiver type : FC: Twin Axial Pair (TW)
Transceiver type : FC: 1200 MBytes/sec
Transceiver type : FC: 800 MBytes/sec
Transceiver type : FC: 400 MBytes/sec
Transceiver type : FC: 200 MBytes/sec
Transceiver type : FC: 100 MBytes/sec
Encoding : 0x00 (unspecified)
BR, Nominal : 10300MBd
Rate identifier : 0x00 (unspecified)
Length (SMF,km) : 0km
Length (SMF) : 0m
Length (50um) : 0m
Length (62.5um) : 0m
Length (Copper) : 3m
Length (OM3) : 0m
Passive Cu cmplnce. : 0x01 (SFF-8431 appendix E) [SFF-8472 rev10.4 only]
Vendor name : Ubiquiti Inc.
Vendor OUI : 24:5a:4c
Vendor PN : DAC-SFP10-3M
Vendor rev : A1
Option values : 0x00 0x00
BR margin, max : 0%
BR margin, min : 0%
Vendor SN : BA21082500111
Date code : 210821
Click to expand...
Still, I can infer the speed from the output.
 
You must log in or register to reply here.

Similar threads

A
  • Locked
NIC not negotiate giga speed
Replies
1
Views
2K
peterh
P
M
  • Locked
Ethernet NIC configuration
Replies
1
Views
2K
cyberjock
C
B
  • Locked
Wake On lan ; how to avoid "nfe0 up and down"
Replies
2
Views
1K
Blanche
B
ovalcoconut
SOLVED ifconfig tun0 difficulties with openvpn
Replies
7
Views
6K
ovalcoconut
ovalcoconut
C
SOLVED Beware of long ethernet runs and regularly check link speeds, a basic gigabit introduction
Replies
0
Views
1K
ccdff
C
Top