IP-MACSEC(8) Linux IP-MACSEC(8)
NAME
ip-macsec - MACsec device configuration
SYNOPSIS
ip link add link DEVICE name NAME type macsec [ [ address <lladdr> ]
port PORT | sci <u64> ] [ cipher { default | gcm-aes-128 | gcm-aes-256
| gcm-aes-xpn-128 | gcm-aes-xpn-256 } ] [ icvlen ICVLEN ] [ encrypt {
on | off } ] [ send_sci { on | off } ] [ end_station { on | off } ] [
scb { on | off } ] [ protect { on | off } ] [ replay { on | off } ] [
window WINDOW ] [ validate { strict | check | disabled } ] [ encodingsa
SA ] [ offload { off | phy | mac } ]
ip macsec add DEV tx sa { 0..3 } [ OPTS ] key ID KEY
ip macsec set DEV tx sa { 0..3 } [ OPTS ]
ip macsec del DEV tx sa { 0..3 }
ip macsec add DEV rx SCI [ on | off ]
ip macsec set DEV rx SCI [ on | off ]
ip macsec del DEV rx SCI
ip macsec add DEV rx SCI sa { 0..3 } [ OPTS ] key ID KEY
ip macsec set DEV rx SCI sa { 0..3 } [ OPTS ]
ip macsec del DEV rx SCI sa { 0..3 }
ip macsec offload DEV { off | phy | mac }
ip macsec show [ DEV ]
OPTS := [ pn { 1..2^32-1 } | xpn { 1..2^64-1 } ] [ salt SALT ] [ ssci
<u32> ] [ on | off ]
SCI := { sci <u64> | port PORT address <lladdr> }
PORT := { 1..2^16-1 }
SALT := 96-bit hex string
DESCRIPTION
The ip macsec commands are used to configure transmit secure associa-
tions and receive secure channels and their secure associations on a
MACsec device created with the ip link add command using the macsec
type.
EXAMPLES
Create a MACsec device on link eth0 (offload is disabled by default)
# ip link add link eth0 macsec0 type macsec port 11 encrypt on
Configure a secure association on that device
# ip macsec add macsec0 tx sa 0 pn 1024 on key 01 81818181818181818181818181818181
Configure a receive channel
# ip macsec add macsec0 rx port 1234 address c6:19:52:8f:e6:a0
Configure a receive association
# ip macsec add macsec0 rx port 1234 address c6:19:52:8f:e6:a0 sa 0 pn 1 on key 00 82828282828282828282828282828282
Display MACsec configuration
# ip macsec show
Configure offloading on an interface
# ip macsec offload macsec0 phy
Configure offloading upon MACsec device creation
# ip link add link eth0 macsec0 type macsec port 11 encrypt on offload mac
EXTENDED PACKET NUMBER EXAMPLES
Create a MACsec device on link eth0 with enabled extended packet number
(offload is disabled by default)
# ip link add link eth0 macsec0 type macsec port 11 encrypt on cipher gcm-aes-xpn-128
Configure a secure association on that device
# ip macsec add macsec0 tx sa 0 xpn 1024 on salt 838383838383838383838383 ssci 123 key 01 81818181818181818181818181818181
Configure a receive channel
# ip macsec add macsec0 rx port 11 address c6:19:52:8f:e6:a0
Configure a receive association
# ip macsec add macsec0 rx port 11 address c6:19:52:8f:e6:a0 sa 0 xpn 1 on salt 838383838383838383838383 ssci 123 key 00 82828282828282828282828282828282
Display MACsec configuration
# ip macsec show
NOTES
This tool can be used to configure the 802.1AE keys of the interface.
Note that 802.1AE uses GCM-AES with a initialization vector (IV)
derived from the packet number. The same key must not be used with the
same IV more than once. Instead, keys must be frequently regenerated
and distributed. This tool is thus mostly for debugging and testing,
or in combination with a user-space application that reconfigures the
keys. It is wrong to just configure the keys statically and assume them
to work indefinitely. The suggested and standardized way for key man-
agement is 802.1X-2010, which is implemented by wpa_supplicant.
EXTENDED PACKET NUMBER NOTES
Passing cipher gcm-aes-xpn-128 or gcm-aes-xpn-256 to ip link add com-
mand using the macsec type requires using the keyword 'xpn' instead of
'pn' in addition to providing a salt using the 'salt' keyword and ssci
using the 'ssci' keyword when using the ip macsec command.
SEE ALSO
ip-link(8) wpa_supplicant(8)
AUTHOR
Sabrina Dubroca <sd AT queasysnail.net>
iproute 07 Mar 2016 IP-MACSEC(8)
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