Acabei de instalar uma NIC de 4 portas na minha caixa do servidor Ubuntu 16.04. A placa de rede interna ainda funciona bem e as duas primeiras portas (qualquer duas) funcionam bem no novo cartão. Mas não importa em qual sequência eu inicialize as interfaces, a 4ª e 5ª recusam-se a obter endereços IP e inicializar.
Acredito que exista algum limite que faz com que o processo DHCP funcione corretamente nas três primeiras interfaces de rede, mas falha nos próximos dois.
Eu testei derrubando todos, menos a interface interna (porque estou acessando via ssh e preciso dessa interface para conectar). Então Em uso ifup em cada interface com a mão. Não importa em qual sequência eu trago as interfaces, recebo duas que funcionam e duas que falham das 4 na nova placa.
ifconfig (observe enp3s0 e enp6s0)
enp3s0 Link encap:Ethernet HWaddr 00:e0:4c:68:0a:5a
inet6 addr: fe80::2e0:4cff:fe68:a5a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6857 errors:0 dropped:0 overruns:0 frame:0
TX packets:111 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:420291 (420.2 KB) TX bytes:27522 (27.5 KB)
enp4s0 Link encap:Ethernet HWaddr 00:e0:4c:68:0a:5b
inet addr:192.168.1.203 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::2e0:4cff:fe68:a5b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3600 errors:0 dropped:0 overruns:0 frame:0
TX packets:21 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:235024 (235.0 KB) TX bytes:3006 (3.0 KB)
enp5s0 Link encap:Ethernet HWaddr 00:e0:4c:68:0a:5c
inet addr:192.168.1.115 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::2e0:4cff:fe68:a5c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:751 errors:0 dropped:0 overruns:0 frame:0
TX packets:72 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:85444 (85.4 KB) TX bytes:14184 (14.1 KB)
enp6s0 Link encap:Ethernet HWaddr 00:e0:4c:68:0a:5d
inet6 addr: fe80::2e0:4cff:fe68:a5d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3554 errors:0 dropped:0 overruns:0 frame:0
TX packets:115 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:213789 (213.7 KB) TX bytes:28890 (28.8 KB)
enp7s0 Link encap:Ethernet HWaddr 90:2b:34:97:d8:53
inet addr:192.168.1.112 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::922b:34ff:fe97:d853/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2888736 errors:0 dropped:0 overruns:0 frame:0
TX packets:3313452 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:683422371 (683.4 MB) TX bytes:1293115042 (1.2 GB)
Minha interface interna é enp7s0, então não posso derrubá-la sem perder minha conexão ssh.
Mas se eu derrubar 3-6 e depois fazer o backup em uma ordem diferente, obtenho um resultado diferente.
ifconfig (observe enp5s0 e enp6s0)
enp3s0 Link encap:Ethernet HWaddr 00:e0:4c:68:0a:5a
inet addr:192.168.1.110 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::2e0:4cff:fe68:a5a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:7689 errors:0 dropped:0 overruns:0 frame:0
TX packets:121 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:470779 (470.7 KB) TX bytes:28854 (28.8 KB)
enp4s0 Link encap:Ethernet HWaddr 00:e0:4c:68:0a:5b
inet addr:192.168.1.203 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::2e0:4cff:fe68:a5b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3724 errors:0 dropped:0 overruns:0 frame:0
TX packets:31 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:246046 (246.0 KB) TX bytes:4338 (4.3 KB)
enp5s0 Link encap:Ethernet HWaddr 00:e0:4c:68:0a:5c
inet6 addr: fe80::2e0:4cff:fe68:a5c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:805 errors:0 dropped:0 overruns:0 frame:0
TX packets:85 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:90464 (90.4 KB) TX bytes:16542 (16.5 KB)
enp6s0 Link encap:Ethernet HWaddr 00:e0:4c:68:0a:5d
inet6 addr: fe80::2e0:4cff:fe68:a5d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4385 errors:0 dropped:0 overruns:0 frame:0
TX packets:133 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:263649 (263.6 KB) TX bytes:32958 (32.9 KB)
enp7s0 Link encap:Ethernet HWaddr 90:2b:34:97:d8:53
inet addr:192.168.1.112 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::922b:34ff:fe97:d853/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2931383 errors:0 dropped:0 overruns:0 frame:0
TX packets:3358859 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:695890607 (695.8 MB) TX bytes:1306715847 (1.3 GB)
Aqui estão os resultados da última tentativa ifup , eu executei a mesma tarefa com ifdown e depois ifup tendo as interfaces em uma sequência diferente a cada vez. Sempre os dois últimos falham. Mas os que trabalham recebem bons endereços IP. Algo parece muito errado sobre isso.
sudo ifup enp6s0 enp5s0 enp4s0 enp3s0
Internet Systems Consortium DHCP Client 4.3.3
Copyright 2004-2015 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/enp6s0/00:e0:4c:68:0a:5d
Sending on LPF/enp6s0/00:e0:4c:68:0a:5d
Sending on Socket/fallback
DHCPDISCOVER on enp6s0 to 255.255.255.255 port 67 interval 3 (xid=0xd8b27778)
DHCPDISCOVER on enp6s0 to 255.255.255.255 port 67 interval 7 (xid=0xd8b27778)
DHCPREQUEST of 192.168.1.205 on enp6s0 to 255.255.255.255 port 67 (xid=0x7877b2d8)
DHCPOFFER of 192.168.1.205 from 192.168.1.1
DHCPACK of 192.168.1.205 from 192.168.1.1
bound to 192.168.1.205 -- renewal in 32722 seconds.
Internet Systems Consortium DHCP Client 4.3.3
Copyright 2004-2015 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/enp5s0/00:e0:4c:68:0a:5c
Sending on LPF/enp5s0/00:e0:4c:68:0a:5c
Sending on Socket/fallback
DHCPDISCOVER on enp5s0 to 255.255.255.255 port 67 interval 3 (xid=0x9001ca46)
DHCPDISCOVER on enp5s0 to 255.255.255.255 port 67 interval 3 (xid=0x9001ca46)
DHCPDISCOVER on enp5s0 to 255.255.255.255 port 67 interval 4 (xid=0x9001ca46)
DHCPREQUEST of 192.168.1.115 on enp5s0 to 255.255.255.255 port 67 (xid=0x46ca0190)
DHCPOFFER of 192.168.1.115 from 192.168.1.1
DHCPACK of 192.168.1.115 from 192.168.1.1
bound to 192.168.1.115 -- renewal in 39657 seconds.
Internet Systems Consortium DHCP Client 4.3.3
Copyright 2004-2015 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/enp4s0/00:e0:4c:68:0a:5b
Sending on LPF/enp4s0/00:e0:4c:68:0a:5b
Sending on Socket/fallback
DHCPDISCOVER on enp4s0 to 255.255.255.255 port 67 interval 3 (xid=0x88fe0427)
DHCPDISCOVER on enp4s0 to 255.255.255.255 port 67 interval 6 (xid=0x88fe0427)
DHCPDISCOVER on enp4s0 to 255.255.255.255 port 67 interval 14 (xid=0x88fe0427)
DHCPDISCOVER on enp4s0 to 255.255.255.255 port 67 interval 21 (xid=0x88fe0427)
DHCPDISCOVER on enp4s0 to 255.255.255.255 port 67 interval 17 (xid=0x88fe0427)
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
Internet Systems Consortium DHCP Client 4.3.3
Copyright 2004-2015 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/enp3s0/00:e0:4c:68:0a:5a
Sending on LPF/enp3s0/00:e0:4c:68:0a:5a
Sending on Socket/fallback
DHCPDISCOVER on enp3s0 to 255.255.255.255 port 67 interval 3 (xid=0xffe5cb17)
DHCPDISCOVER on enp3s0 to 255.255.255.255 port 67 interval 5 (xid=0xffe5cb17)
DHCPDISCOVER on enp3s0 to 255.255.255.255 port 67 interval 12 (xid=0xffe5cb17)
DHCPDISCOVER on enp3s0 to 255.255.255.255 port 67 interval 21 (xid=0xffe5cb17)
DHCPDISCOVER on enp3s0 to 255.255.255.255 port 67 interval 17 (xid=0xffe5cb17)
DHCPDISCOVER on enp3s0 to 255.255.255.255 port 67 interval 3 (xid=0xffe5cb17)
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
/ etc / network / interfaces
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto enp7s0
iface enp7s0 inet dhcp
auto enp3s0
iface enp3s0 inet dhcp
auto enp4s0
iface enp4s0 inet dhcp
auto enp5s0
iface enp5s0 inet dhcp
auto enp6s0
iface enp6s0 inet dhcp
/etc/dhcp/dhclient.conf
option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;
send host-name = gethostname();
request subnet-mask, broadcast-address, time-offset, routers,
domain-name, domain-name-servers, domain-search, host-name,
dhcp6.name-servers, dhcp6.domain-search, dhcp6.fqdn, dhcp6.sntp-servers,
netbios-name-servers, netbios-scope, interface-mtu,
rfc3442-classless-static-routes, ntp-servers;
timeout 60;
Qualquer sugestão será muito apreciada.