| 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/calss/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>/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. |
