Lists all the network interfaces with Link Status (UP/DOWN), current speed (Mbps) and Mode Duplex (Half/Full)
bash-3.00# dladm show-dev
bge0 link: unknown speed: 0 Mbps duplex: unknown
bge1 link: unknown speed: 0 Mbps duplex: unknown
nxge0 link: up speed: 10000 Mbps duplex: full
nxge1 link: down speed: 0 Mbps duplex: unknown
nxge2 link: up speed: 10000 Mbps duplex: full
nxge3 link: down speed: 0 Mbps duplex: unknown
MTU and the VLAN tagging detail
bash-3.00# dladm show-link
bge0 type: non-vlan mtu: 1500 device: bge0
bge1 type: non-vlan mtu: 1500 device: bge1
nxge0 type: non-vlan mtu: 1500 device: nxge0
nxge1 type: non-vlan mtu: 1500 device: nxge1
nxge2 type: non-vlan mtu: 1500 device: nxge2
nxge3 type: non-vlan mtu: 1500 device: nxge3
Network traffic statistics including Input/Output packets & errors
bash-3.00# dladm show-dev -s
ipackets rbytes ierrors opackets obytes oerrors
bge0 0 0 0 0 0 0
bge1 0 0 0 0 0 0
nxge0 1158473674053083230732460 728537323272594316715650
nxge1 0 0 0 0 0 0
nxge2 28919953 1741794926 0 790379298980418528244420
nxge3 0 0 0 0 0 0
Displays network traffic statistics (in this example every 5 seconds)
bash-3.00# dladm show-link -s -i 5 nxge0
ipackets rbytes ierrors opackets obytes oerrors
nxge0 1158478616053083356284770 728538625972594339077740
ipackets rbytes ierrors opackets obytes oerrors
nxge0 1678 206109 0 464 89159 0
ipackets rbytes ierrors opackets obytes oerrors
nxge0 1369 128339 0 373 51196 0
ipackets rbytes ierrors opackets obytes oerrors
nxge0 1926 1213927 0 618 79638 0
ipackets rbytes ierrors opackets obytes oerrors
nxge0 1315 154370 0 400 64380 0
dladm is the admin utility for Data-Link Interface which helps to display informarthe like Link Status (UP/DOWN), Speed, Duplex, MTU, VLAN Tagged and crucially statistics of network traffic on each of the interfaces historically as well as in real time. dladm can also configure and admin Link Aggregation on multiple NICs which we will not focus here.
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