| What: /sys/class/net/<iface>/name_assign_type | |
| Date: July 2014 | |
| KernelVersion: 3.17 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the name assignment type. Possible values are: | |
| 1: enumerated by the kernel, possibly in an unpredictable way | |
| 2: predictably named by the kernel | |
| 3: named by userspace | |
| 4: renamed | |
| What: /sys/class/net/<iface>/addr_assign_type | |
| Date: July 2010 | |
| KernelVersion: 3.2 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the address assignment type. Possible values are: | |
| 0: permanent address | |
| 1: randomly generated | |
| 2: stolen from another device | |
| 3: set using dev_set_mac_address | |
| What: /sys/class/net/<iface>/addr_len | |
| Date: April 2005 | |
| KernelVersion: 2.6.12 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the hardware address size in bytes. | |
| Values vary based on the lower-level protocol used by the | |
| interface (Ethernet, FDDI, ATM, IEEE 802.15.4...). See | |
| include/uapi/linux/if_*.h for actual values. | |
| What: /sys/class/net/<iface>/address | |
| Date: April 2005 | |
| KernelVersion: 2.6.12 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Hardware address currently assigned to this interface. | |
| Format is a string, e.g: 00:11:22:33:44:55 for an Ethernet MAC | |
| address. | |
| What: /sys/class/net/<iface>/broadcast | |
| Date: April 2005 | |
| KernelVersion: 2.6.12 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Hardware broadcast address for this interface. Format is a | |
| string, e.g: ff:ff:ff:ff:ff:ff for an Ethernet broadcast MAC | |
| address. | |
| What: /sys/class/net/<iface>/carrier | |
| Date: April 2005 | |
| KernelVersion: 2.6.12 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the current physical link state of the interface. | |
| Posssible values are: | |
| 0: physical link is down | |
| 1: physical link is up | |
| Note: some special devices, e.g: bonding and team drivers will | |
| allow this attribute to be written to force a link state for | |
| operating correctly and designating another fallback interface. | |
| What: /sys/class/net/<iface>/dev_id | |
| Date: April 2008 | |
| KernelVersion: 2.6.26 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the device unique identifier. Format is an hexadecimal | |
| value. This is used to disambiguate interfaces which might be | |
| stacked (e.g: VLAN interfaces) but still have the same MAC | |
| address as their parent device. | |
| What: /sys/class/net/<iface>/dormant | |
| Date: March 2006 | |
| KernelVersion: 2.6.17 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates whether the interface is in dormant state. Possible | |
| values are: | |
| 0: interface is not dormant | |
| 1: interface is dormant | |
| This attribute can be used by supplicant software to signal that | |
| the device is not usable unless some supplicant-based | |
| authentication is performed (e.g: 802.1x). 'link_mode' attribute | |
| will also reflect the dormant state. | |
| What: /sys/clas/net/<iface>/duplex | |
| Date: October 2009 | |
| KernelVersion: 2.6.33 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the interface latest or current duplex value. Possible | |
| values are: | |
| half: half duplex | |
| full: full duplex | |
| Note: This attribute is only valid for interfaces that implement | |
| the ethtool get_settings method (mostly Ethernet). | |
| What: /sys/class/net/<iface>/flags | |
| Date: April 2005 | |
| KernelVersion: 2.6.12 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the interface flags as a bitmask in hexadecimal. See | |
| include/uapi/linux/if.h for a list of all possible values and | |
| the flags semantics. | |
| What: /sys/class/net/<iface>/ifalias | |
| Date: September 2008 | |
| KernelVersion: 2.6.28 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates/stores an interface alias name as a string. This can | |
| be used for system management purposes. | |
| What: /sys/class/net/<iface>/ifindex | |
| Date: April 2005 | |
| KernelVersion: 2.6.12 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the system-wide interface unique index identifier as a | |
| decimal number. This attribute is used for mapping an interface | |
| identifier to an interface name. It is used throughout the | |
| networking stack for specifying the interface specific | |
| requests/events. | |
| What: /sys/class/net/<iface>/iflink | |
| Date: April 2005 | |
| KernelVersion: 2.6.12 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the system-wide interface unique index identifier a | |
| the interface is linked to. Format is decimal. This attribute is | |
| used to resolve interfaces chaining, linking and stacking. | |
| Physical interfaces have the same 'ifindex' and 'iflink' values. | |
| What: /sys/class/net/<iface>/link_mode | |
| Date: March 2006 | |
| KernelVersion: 2.6.17 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the interface link mode, as a decimal number. This | |
| attribute should be used in conjunction with 'dormant' attribute | |
| to determine the interface usability. Possible values: | |
| 0: default link mode | |
| 1: dormant link mode | |
| What: /sys/class/net/<iface>/mtu | |
| Date: April 2005 | |
| KernelVersion: 2.6.12 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the interface currently configured MTU value, in | |
| bytes, and in decimal format. Specific values depends on the | |
| lower-level interface protocol used. Ethernet devices will show | |
| a 'mtu' attribute value of 1500 unless changed. | |
| What: /sys/class/net/<iface>/netdev_group | |
| Date: January 2011 | |
| KernelVersion: 2.6.39 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the interface network device group, as a decimal | |
| integer. Default value is 0 which corresponds to the initial | |
| network devices group. The group can be changed to affect | |
| routing decisions (see: net/ipv4/fib_rules and | |
| net/ipv6/fib6_rules.c). | |
| What: /sys/class/net/<iface>/operstate | |
| Date: March 2006 | |
| KernelVersion: 2.6.17 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the interface RFC2863 operational state as a string. | |
| Possible values are: | |
| "unknown", "notpresent", "down", "lowerlayerdown", "testing", | |
| "dormant", "up". | |
| What: /sys/class/net/<iface>/phys_port_id | |
| Date: July 2013 | |
| KernelVersion: 3.12 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the interface unique physical port identifier within | |
| the NIC, as a string. | |
| What: /sys/class/net/<iface>/speed | |
| Date: October 2009 | |
| KernelVersion: 2.6.33 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the interface latest or current speed value. Value is | |
| an integer representing the link speed in Mbits/sec. | |
| Note: this attribute is only valid for interfaces that implement | |
| the ethtool get_settings method (mostly Ethernet ). | |
| What: /sys/class/net/<iface>/tx_queue_len | |
| Date: April 2005 | |
| KernelVersion: 2.6.12 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the interface transmit queue len in number of packets, | |
| as an integer value. Value depend on the type of interface, | |
| Ethernet network adapters have a default value of 1000 unless | |
| configured otherwise | |
| What: /sys/class/net/<iface>/type | |
| Date: April 2005 | |
| KernelVersion: 2.6.12 | |
| Contact: netdev@vger.kernel.org | |
| Description: | |
| Indicates the interface protocol type as a decimal value. See | |
| include/uapi/linux/if_arp.h for all possible values. |