показывать / управлять адресами моста и устройствами (show / manipulate bridge addresses and devices)
bridge fdb - forwarding database management
fdb objects contain known Ethernet addresses on a link.
The corresponding commands display fdb entries, add new entries,
append entries, and delete old ones.
bridge fdb add - add a new fdb entry
This command creates a new fdb entry.
LLADDR the Ethernet MAC address.
dev DEV
the interface to which this address is associated.
local - is a local permanent fdb entry, which means that
the bridge will not forward frames with this destination
MAC address and VLAN ID, but terminate them locally. This
flag is default unless "static" or "dynamic" are
explicitly specified.
permanent - this is a synonym for "local"
static - is a static (no arp) fdb entry
dynamic - is a dynamic reachable age-able fdb entry
self - the operation is fulfilled directly by the driver
for the specified network device. If the network device
belongs to a master like a bridge, then the bridge is
bypassed and not notified of this operation (and if the
device does notify the bridge, it is driver-specific
behavior and not mandated by this flag, check the driver
for more details). The "bridge fdb add" command can also
be used on the bridge device itself, and in this case, the
added fdb entries will be locally terminated (not
forwarded). In the latter case, the "self" flag is
mandatory. The flag is set by default if "master" is not
specified.
master - if the specified network device is a port that
belongs to a master device such as a bridge, the operation
is fulfilled by the master device's driver, which may in
turn notify the port driver too of the address. If the
specified device is a master itself, such as a bridge,
this flag is invalid.
router - the destination address is associated with a
router. Valid if the referenced device is a VXLAN type
device and has route short circuit enabled.
use - the address is in use. User space can use this
option to indicate to the kernel that the fdb entry is in
use.
extern_learn - this entry was learned externally. This
option can be used to indicate to the kernel that an entry
was hardware or user-space controller learnt dynamic
entry. Kernel will not age such an entry.
sticky - this entry will not change its port due to
learning.
The next command line parameters apply only when the specified
device DEV is of type VXLAN.
dst IPADDR
the IP address of the destination VXLAN tunnel endpoint
where the Ethernet MAC ADDRESS resides.
src_vni VNI
the src VNI Network Identifier (or VXLAN Segment ID) this
entry belongs to. Used only when the vxlan device is in
external or collect metadata mode. If omitted the value
specified at vxlan device creation will be used.
vni VNI
the VXLAN VNI Network Identifier (or VXLAN Segment ID) to
use to connect to the remote VXLAN tunnel endpoint. If
omitted the value specified at vxlan device creation will
be used.
port PORT
the UDP destination PORT number to use to connect to the
remote VXLAN tunnel endpoint. If omitted the default
value is used.
via DEVICE
device name of the outgoing interface for the VXLAN device
driver to reach the remote VXLAN tunnel endpoint.
nhid NHID
ecmp nexthop group for the VXLAN device driver to reach
remote VXLAN tunnel endpoints.
bridge fdb append - append a forwarding database entry
This command adds a new fdb entry with an already known LLADDR.
Valid only for multicast link layer addresses. The command adds
support for broadcast and multicast Ethernet MAC addresses. The
Ethernet MAC address is added multiple times into the forwarding
database and the vxlan device driver sends a copy of the data
packet to each entry found.
The arguments are the same as with bridge fdb add.
bridge fdb delete - delete a forwarding database entry
This command removes an existing fdb entry.
The arguments are the same as with bridge fdb add.
bridge fdb replace - replace a forwarding database entry
If no matching entry is found, a new one will be created instead.
The arguments are the same as with bridge fdb add.
bridge fdb show - list forwarding entries.
This command displays the current forwarding table.
With the -statistics option, the command becomes verbose. It
prints out the last updated and last used time for each entry.
bridge fdb get - get bridge forwarding entry.
lookup a bridge forwarding table entry.
LLADDR the Ethernet MAC address.
dev DEV
the interface to which this address is associated.
brport DEV
the bridge port to which this address is associated. same
as dev above.
br DEV the bridge to which this address is associated.
self - the address is associated with the port drivers fdb.
Usually hardware.
master - the address is associated with master devices fdb.
Usually software (default).
