É um bug. Já existe um patch, então você pode esperar que ele ser corrigido no próximo lançamento. Graças a wurtel por denunciá-lo.
Quando eu chamo ip addr show , recebo a saída com todas as interfaces e seus endereços IP (veja em eth7 ):
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:1c:42:e9:3d:aa brd ff:ff:ff:ff:ff:ff
inet 172.11.98.248/16 brd 172.11.255.255 scope global eth1
3: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc cbq state UP qlen 1000
link/ether 00:1c:42:c6:d0:c4 brd ff:ff:ff:ff:ff:ff
inet 10.28.98.242/19 brd 10.28.127.255 scope global eth2
4: eth4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:1c:42:56:14:28 brd ff:ff:ff:ff:ff:ff
inet 10.28.98.249/24 scope global eth4
5: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:1c:42:03:06:77 brd ff:ff:ff:ff:ff:ff
inet 10.28.98.230/19 brd 10.28.127.255 scope global eth3
6: eth7: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
link/ether 00:1c:42:4d:cb:d7 brd ff:ff:ff:ff:ff:ff
inet 10.28.98.231/24 scope global eth7
inet 192.168.13.0/18 scope global eth7
7: eth5: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
link/ether 00:1c:42:81:0a:a4 brd ff:ff:ff:ff:ff:ff
8: eth6: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
link/ether 00:1c:42:5c:12:40 brd ff:ff:ff:ff:ff:ff
9: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
link/ether b2:c1:df:b1:29:c7 brd ff:ff:ff:ff:ff:ff
inet 10.47.130.2/24 brd 10.47.130.255 scope global br0
10: br1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
link/ether 52:b4:3a:90:f2:05 brd ff:ff:ff:ff:ff:ff
11: venet0: <BROADCAST,POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
link/void
Mas quando eu chamo o mesmo comando ip addr show up , mas apenas para interfaces atualizadas, obtenho resultados estranhos:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:1c:42:e9:3d:aa brd ff:ff:ff:ff:ff:ff
inet 172.11.98.248/16 brd 172.11.255.255 scope global eth1
3: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc cbq state UP qlen 1000
link/ether 00:1c:42:c6:d0:c4 brd ff:ff:ff:ff:ff:ff
inet 10.28.98.242/19 brd 10.28.127.255 scope global eth2
4: eth4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:1c:42:56:14:28 brd ff:ff:ff:ff:ff:ff
inet 10.28.98.249/24 scope global eth4
5: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:1c:42:03:06:77 brd ff:ff:ff:ff:ff:ff
inet 10.28.98.230/19 brd 10.28.127.255 scope global eth3
inet 10.28.98.231/24 scope global eth7
inet 192.168.13.0/18 scope global eth7
9: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
link/ether b2:c1:df:b1:29:c7 brd ff:ff:ff:ff:ff:ff
inet 10.47.130.2/24 brd 10.47.130.255 scope global br0
10: br1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
link/ether 52:b4:3a:90:f2:05 brd ff:ff:ff:ff:ff:ff
11: venet0: <BROADCAST,POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
link/void
Estou esperando que as interfaces desativadas simplesmente desapareçam da saída. Mas, de alguma forma estranha para mim, vejo que não apenas eles desaparecem, mas também os endereços IP 192.168.13.0/18 , 10.28.98.231/24 atribuído anteriormente a eth7 está atualmente atribuído a eth3 .
Este comportamento é normal e por que isso acontece? E por que esses endereços IP foram atribuídos a eth3 interfaces e não a outros?