How to find network card details on RHEL machines

Question

Is it possible to find out the details about Linux cards?

For example we tried:

dmidecode | grep -i network
                Function key-initiated network boot is supported
        Port Type: Network Port
        Port Type: Network Port
        Port Type: Network Port
        Port Type: Network Port
# dmidecode | grep -i eth
        Type: Ethernet
        Type: Ethernet
        Type: Ethernet
        Type: Ethernet

This details doesn't say anything about the network cards and performance etc.

Any advice about tools that can give these details about network cards?

Solution

For getting the brand/model of the network card, usually you run:

$ lspci | grep -i Ethernet
02:01.0 Ethernet controller: Intel Corporation 82545EM Gigabit Ethernet Controller (Copper) (rev 01)

Or for getting more detail of the NIC(s):

$ sudo lshw -class network
 *-network                 
       description: Ethernet interface
       product: 82545EM Gigabit Ethernet Controller (Copper)
       vendor: Intel Corporation
       physical id: 1
       bus info: pci@0000:02:01.0
       logical name: eth0
       version: 01
       serial: 00:0c:29:25:4d:0e
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 66MHz
       capabilities: pm pcix bus_master cap_list rom ethernet physical logical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000 driverversion=7.3.21-k8-NAPI duplex=full ip=192.168.5.143 latency=0 link=yes mingnt=255 multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:19 memory:fd5c0000-fd5dffff memory:fdff0000-fdffffff ioport:2000(size=64) memory:fd500000-fd50ffff

Grepping dmesg for the network device might also help:

$ dmesg | grep eth0
[    1.635942] e1000 0000:02:01.0 eth0: (PCI:66MHz:32-bit) 00:0c:29:25:4d:0e
[    1.635960] e1000 0000:02:01.0 eth0: Intel(R) PRO/1000 Network Connection
[    3.736090] e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
[    3.742639] 8021q: adding VLAN 0 to HW filter on device eth0

As for dmidecode, dmidecode -t baseboard might show information about NICs that are built-in in the motherboard.

PS As for Unix SE questions, when dealing with hardware questions, a full lscpi output is probably more useful.

Comments

[yael]

can you please give your smart opinion about the post - unix.stackexchange.com/questions/585970/…