784b58a327
BR_GROUPFWD_RESTRICTED bitmask restricts users from setting values to /sys/class/net/brX/bridge/group_fwd_mask that allow forwarding of some IEEE 802.1D Table 7-10 Reserved addresses: (MAC Control) 802.3 01-80-C2-00-00-01 (Link Aggregation) 802.3 01-80-C2-00-00-02 802.1AB LLDP 01-80-C2-00-00-0E Change BR_GROUPFWD_RESTRICTED to allow to forward LLDP frames and document group_fwd_mask. e.g. echo 16384 > /sys/class/net/brX/bridge/group_fwd_mask allows to forward LLDP frames. This may be needed for bridge setups used for network troubleshooting or any other scenario where forwarding of LLDP frames is desired (e.g. bridge connecting a virtual machine to real switch transmitting LLDP frames that virtual machine needs to receive). Tested on a simple bridge setup with two interfaces and host transmitting LLDP frames on one side of this bridge (used lldpd). Setting group_fwd_mask as described above lets LLDP frames traverse bridge. Signed-off-by: Bernhard Thaler <bernhard.thaler@wvnet.at> Signed-off-by: David S. Miller <davem@davemloft.net>
253 lines
8 KiB
Text
253 lines
8 KiB
Text
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: netdev@vger.kernel.org
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Description:
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Indicates the name assignment type. Possible values are:
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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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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: netdev@vger.kernel.org
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Description:
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Indicates the address assignment type. Possible values are:
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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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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: netdev@vger.kernel.org
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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: netdev@vger.kernel.org
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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: netdev@vger.kernel.org
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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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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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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: netdev@vger.kernel.org
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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: netdev@vger.kernel.org
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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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0: physical link is down
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1: physical link is up
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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: netdev@vger.kernel.org
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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>/dormant
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Date: March 2006
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KernelVersion: 2.6.17
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Contact: netdev@vger.kernel.org
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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/clas/net/<iface>/duplex
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Date: October 2009
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KernelVersion: 2.6.33
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Contact: netdev@vger.kernel.org
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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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half: half duplex
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full: full duplex
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Note: This attribute is only valid for interfaces that implement
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the ethtool get_settings 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: netdev@vger.kernel.org
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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: netdev@vger.kernel.org
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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: netdev@vger.kernel.org
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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: netdev@vger.kernel.org
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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: netdev@vger.kernel.org
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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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0: default link mode
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1: dormant link mode
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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: netdev@vger.kernel.org
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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: netdev@vger.kernel.org
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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: netdev@vger.kernel.org
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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: netdev@vger.kernel.org
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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: netdev@vger.kernel.org
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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: netdev@vger.kernel.org
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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_settings 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: netdev@vger.kernel.org
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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: netdev@vger.kernel.org
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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: netdev@vger.kernel.org
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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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