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354 lines
11 KiB
354 lines
11 KiB
What: /sys/class/net/<iface>/name_assign_type |
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Date: July 2014 |
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KernelVersion: 3.17 |
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Contact: [email protected] |
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Description: |
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Indicates the name assignment type. Possible values are: |
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|
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== ========================================================== |
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1 enumerated by the kernel, possibly in an unpredictable way |
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2 predictably named by the kernel |
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3 named by userspace |
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4 renamed |
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== ========================================================== |
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What: /sys/class/net/<iface>/addr_assign_type |
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Date: July 2010 |
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KernelVersion: 3.2 |
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Contact: [email protected] |
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Description: |
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Indicates the address assignment type. Possible values are: |
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== ============================= |
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0 permanent address |
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1 randomly generated |
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2 stolen from another device |
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3 set using dev_set_mac_address |
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== ============================= |
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What: /sys/class/net/<iface>/addr_len |
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Date: April 2005 |
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KernelVersion: 2.6.12 |
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Contact: [email protected] |
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Description: |
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Indicates the hardware address size in bytes. |
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Values vary based on the lower-level protocol used by the |
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interface (Ethernet, FDDI, ATM, IEEE 802.15.4...). See |
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include/uapi/linux/if_*.h for actual values. |
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What: /sys/class/net/<iface>/address |
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Date: April 2005 |
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KernelVersion: 2.6.12 |
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Contact: [email protected] |
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Description: |
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Hardware address currently assigned to this interface. |
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Format is a string, e.g: 00:11:22:33:44:55 for an Ethernet MAC |
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address. |
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What: /sys/class/net/<bridge iface>/bridge/group_fwd_mask |
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Date: January 2012 |
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KernelVersion: 3.2 |
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Contact: [email protected] |
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Description: |
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Bitmask to allow forwarding of link local frames with address |
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01-80-C2-00-00-0X on a bridge device. Only values that set bits |
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not matching BR_GROUPFWD_RESTRICTED in net/bridge/br_private.h |
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allowed. |
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Default value 0 does not forward any link local frames. |
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Restricted bits: |
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== ======================================================== |
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0 01-80-C2-00-00-00 Bridge Group Address used for STP |
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1 01-80-C2-00-00-01 (MAC Control) 802.3 used for MAC PAUSE |
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2 01-80-C2-00-00-02 (Link Aggregation) 802.3ad |
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== ======================================================== |
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Any values not setting these bits can be used. Take special |
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care when forwarding control frames e.g. 802.1X-PAE or LLDP. |
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What: /sys/class/net/<iface>/broadcast |
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Date: April 2005 |
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KernelVersion: 2.6.12 |
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Contact: [email protected] |
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Description: |
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Hardware broadcast address for this interface. Format is a |
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string, e.g: ff:ff:ff:ff:ff:ff for an Ethernet broadcast MAC |
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address. |
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What: /sys/class/net/<iface>/carrier |
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Date: April 2005 |
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KernelVersion: 2.6.12 |
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Contact: [email protected] |
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Description: |
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Indicates the current physical link state of the interface. |
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Posssible values are: |
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== ===================== |
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0 physical link is down |
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1 physical link is up |
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== ===================== |
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Note: some special devices, e.g: bonding and team drivers will |
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allow this attribute to be written to force a link state for |
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operating correctly and designating another fallback interface. |
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What: /sys/class/net/<iface>/dev_id |
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Date: April 2008 |
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KernelVersion: 2.6.26 |
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Contact: [email protected] |
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Description: |
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Indicates the device unique identifier. Format is an hexadecimal |
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value. This is used to disambiguate interfaces which might be |
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stacked (e.g: VLAN interfaces) but still have the same MAC |
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address as their parent device. |
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What: /sys/class/net/<iface>/dev_port |
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Date: February 2014 |
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KernelVersion: 3.15 |
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Contact: [email protected] |
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Description: |
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Indicates the port number of this network device, formatted |
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as a decimal value. Some NICs have multiple independent ports |
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on the same PCI bus, device and function. This attribute allows |
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userspace to distinguish the respective interfaces. |
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Note: some device drivers started to use 'dev_id' for this |
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purpose since long before 3.15 and have not adopted the new |
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attribute ever since. To query the port number, some tools look |
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exclusively at 'dev_port', while others only consult 'dev_id'. |
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If a network device has multiple client adapter ports as |
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described in the previous paragraph and does not set this |
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attribute to its port number, it's a kernel bug. |
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What: /sys/class/net/<iface>/dormant |
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Date: March 2006 |
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KernelVersion: 2.6.17 |
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Contact: [email protected] |
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Description: |
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Indicates whether the interface is in dormant state. Possible |
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values are: |
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0: interface is not dormant |
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1: interface is dormant |
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This attribute can be used by supplicant software to signal that |
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the device is not usable unless some supplicant-based |
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authentication is performed (e.g: 802.1x). 'link_mode' attribute |
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will also reflect the dormant state. |
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What: /sys/class/net/<iface>/testing |
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Date: April 2002 |
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KernelVersion: 5.8 |
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Contact: [email protected] |
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Description: |
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Indicates whether the interface is under test. Possible |
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values are: |
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== ============================= |
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0 interface is not being tested |
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1 interface is being tested |
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== ============================= |
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When an interface is under test, it cannot be expected |
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to pass packets as normal. |
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What: /sys/class/net/<iface>/duplex |
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Date: October 2009 |
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KernelVersion: 2.6.33 |
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Contact: [email protected] |
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Description: |
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Indicates the interface latest or current duplex value. Possible |
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values are: |
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==== =========== |
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half half duplex |
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full full duplex |
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==== =========== |
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Note: This attribute is only valid for interfaces that implement |
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the ethtool get_link_ksettings method (mostly Ethernet). |
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What: /sys/class/net/<iface>/flags |
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Date: April 2005 |
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KernelVersion: 2.6.12 |
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Contact: [email protected] |
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Description: |
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Indicates the interface flags as a bitmask in hexadecimal. See |
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include/uapi/linux/if.h for a list of all possible values and |
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the flags semantics. |
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What: /sys/class/net/<iface>/ifalias |
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Date: September 2008 |
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KernelVersion: 2.6.28 |
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Contact: [email protected] |
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Description: |
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Indicates/stores an interface alias name as a string. This can |
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be used for system management purposes. |
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What: /sys/class/net/<iface>/ifindex |
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Date: April 2005 |
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KernelVersion: 2.6.12 |
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Contact: [email protected] |
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Description: |
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Indicates the system-wide interface unique index identifier as a |
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decimal number. This attribute is used for mapping an interface |
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identifier to an interface name. It is used throughout the |
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networking stack for specifying the interface specific |
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requests/events. |
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What: /sys/class/net/<iface>/iflink |
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Date: April 2005 |
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KernelVersion: 2.6.12 |
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Contact: [email protected] |
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Description: |
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Indicates the system-wide interface unique index identifier a |
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the interface is linked to. Format is decimal. This attribute is |
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used to resolve interfaces chaining, linking and stacking. |
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Physical interfaces have the same 'ifindex' and 'iflink' values. |
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What: /sys/class/net/<iface>/link_mode |
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Date: March 2006 |
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KernelVersion: 2.6.17 |
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Contact: [email protected] |
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Description: |
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Indicates the interface link mode, as a decimal number. This |
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attribute should be used in conjunction with 'dormant' attribute |
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to determine the interface usability. Possible values: |
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== ================= |
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0 default link mode |
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1 dormant link mode |
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== ================= |
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What: /sys/class/net/<iface>/mtu |
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Date: April 2005 |
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KernelVersion: 2.6.12 |
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Contact: [email protected] |
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Description: |
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Indicates the interface currently configured MTU value, in |
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bytes, and in decimal format. Specific values depends on the |
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lower-level interface protocol used. Ethernet devices will show |
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a 'mtu' attribute value of 1500 unless changed. |
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What: /sys/class/net/<iface>/netdev_group |
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Date: January 2011 |
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KernelVersion: 2.6.39 |
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Contact: [email protected] |
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Description: |
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Indicates the interface network device group, as a decimal |
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integer. Default value is 0 which corresponds to the initial |
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network devices group. The group can be changed to affect |
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routing decisions (see: net/ipv4/fib_rules and |
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net/ipv6/fib6_rules.c). |
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What: /sys/class/net/<iface>/operstate |
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Date: March 2006 |
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KernelVersion: 2.6.17 |
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Contact: [email protected] |
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Description: |
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Indicates the interface RFC2863 operational state as a string. |
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Possible values are: |
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"unknown", "notpresent", "down", "lowerlayerdown", "testing", |
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"dormant", "up". |
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What: /sys/class/net/<iface>/phys_port_id |
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Date: July 2013 |
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KernelVersion: 3.12 |
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Contact: [email protected] |
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Description: |
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Indicates the interface unique physical port identifier within |
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the NIC, as a string. |
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What: /sys/class/net/<iface>/phys_port_name |
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Date: March 2015 |
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KernelVersion: 4.0 |
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Contact: [email protected] |
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Description: |
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Indicates the interface physical port name within the NIC, |
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as a string. |
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What: /sys/class/net/<iface>/speed |
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Date: October 2009 |
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KernelVersion: 2.6.33 |
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Contact: [email protected] |
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Description: |
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Indicates the interface latest or current speed value. Value is |
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an integer representing the link speed in Mbits/sec. |
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Note: this attribute is only valid for interfaces that implement |
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the ethtool get_link_ksettings method (mostly Ethernet). |
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What: /sys/class/net/<iface>/tx_queue_len |
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Date: April 2005 |
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KernelVersion: 2.6.12 |
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Contact: [email protected] |
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Description: |
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Indicates the interface transmit queue len in number of packets, |
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as an integer value. Value depend on the type of interface, |
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Ethernet network adapters have a default value of 1000 unless |
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configured otherwise |
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What: /sys/class/net/<iface>/type |
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Date: April 2005 |
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KernelVersion: 2.6.12 |
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Contact: [email protected] |
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Description: |
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Indicates the interface protocol type as a decimal value. See |
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include/uapi/linux/if_arp.h for all possible values. |
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What: /sys/class/net/<iface>/phys_switch_id |
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Date: November 2014 |
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KernelVersion: 3.19 |
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Contact: [email protected] |
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Description: |
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Indicates the unique physical switch identifier of a switch this |
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port belongs to, as a string. |
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What: /sys/class/net/<iface>/phydev |
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Date: May 2017 |
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KernelVersion: 4.13 |
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Contact: [email protected] |
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Description: |
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Symbolic link to the PHY device this network device is attached |
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to. |
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What: /sys/class/net/<iface>/carrier_changes |
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Date: Mar 2014 |
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KernelVersion: 3.15 |
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Contact: [email protected] |
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Description: |
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32-bit unsigned integer counting the number of times the link has |
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seen a change from UP to DOWN and vice versa |
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What: /sys/class/net/<iface>/carrier_up_count |
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Date: Jan 2018 |
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KernelVersion: 4.16 |
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Contact: [email protected] |
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Description: |
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32-bit unsigned integer counting the number of times the link has |
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been up |
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What: /sys/class/net/<iface>/carrier_down_count |
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Date: Jan 2018 |
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KernelVersion: 4.16 |
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Contact: [email protected] |
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Description: |
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32-bit unsigned integer counting the number of times the link has |
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been down |
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What: /sys/class/net/<iface>/threaded |
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Date: Jan 2021 |
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KernelVersion: 5.12 |
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Contact: [email protected] |
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Description: |
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Boolean value to control the threaded mode per device. User could |
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set this value to enable/disable threaded mode for all napi |
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belonging to this device, without the need to do device up/down. |
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Possible values: |
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== ================================== |
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0 threaded mode disabled for this dev |
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1 threaded mode enabled for this dev |
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== ==================================
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