# lspci | grep Ethernet

03:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet (rev 12)

07:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet (rev 12) 

# dmesg |grep eth0
divert: allocating divert_blk for eth0

eth0: RealTek RTL8139 at 0xd800, 00:80:48:34:c2:84, IRQ 9
eth0:  Identified 8139 chip type 'RTL-8100B/8139D'

divert: freeing divert_blk for eth0

divert: allocating divert_blk for eth0

eth0: RealTek RTL8139 at 0xd800, 00:90:44:34:a5:33, IRQ 9

eth0:  Identified 8139 chip type 'RTL-8100B/8139D'

eth0: link up, 100Mbps, full-duplex, lpa 0x41E1

eth0: no IPv6 routers present

...

# mii-tool -v eth0

eth0: negotiated 100baseTx-FD, link ok

product info: vendor 00:00:00, model 0 rev 0

basic mode:   autonegotiation enabled

basic status: autonegotiation complete, link ok
capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD

           10baseT-HD

...

# ethtool eth0


Settings for eth0:

Supported ports: [ TP MII ]

Supported link modes:   10baseT/Half 10baseT/Full

                        100baseT/Half 100baseT/Full

Supports auto-negotiation: Yes

Advertised link modes:  10baseT/Half 10baseT/Full

                        100baseT/Half 100baseT/Full

Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full

Port: MII

PHYAD: 32

Transceiver: internal
Auto-negotiation: on

Supports Wake-on: pumbg

Wake-on: p

Current message level: 0x00000007 (7)

Link detected: yes