[systemd-devel] networkd link file not setting MTU

[Ian Pilcher]

I am trying to use systemd-networkd on Fedora 21, and I haven't been
able to get it to set the MTU of an interface correctly:

[root at localhost network]# cat eth0.link
[Match]
MACAddress=52:54:00:d8:3d:3e

[Link]
MTUBytes=8996
[root at localhost network]#

[root at localhost network]# cat eth0.network
[Match]
MACAddress=52:54:00:d8:3d:3e

[Network]
DHCP=yes

[root at localhost network]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.31.253.166  netmask 255.255.255.0  broadcast 172.31.253.255
        inet6 fe80::5054:ff:fed8:3d3e  prefixlen 64  scopeid 0x20<link>
        ether 52:54:00:d8:3d:3e  txqueuelen 1000  (Ethernet)
        RX packets 389  bytes 35608 (34.7 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 245  bytes 28600 (27.9 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 0  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

As you can see, the MTU is not being set, although setting it manually
works fine:

[root at localhost network]# ifconfig eth0 mtu 8996
[root at localhost network]# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 8996
        inet 172.31.253.166  netmask 255.255.255.0  broadcast 172.31.253.255
        inet6 fe80::5054:ff:fed8:3d3e  prefixlen 64  scopeid 0x20<link>
        ether 52:54:00:d8:3d:3e  txqueuelen 1000  (Ethernet)
        RX packets 586  bytes 51538 (50.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 288  bytes 33908 (33.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Any idea what I'm missing?

-- 
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Ian Pilcher                                         arequipeno at gmail.com
-------- "I grew up before Mark Zuckerberg invented friendship" --------
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