数日前、私はDebian Jessieのインストールを新しいLinuxカーネル（uname -a与えられた3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt20-1+deb8u3 (2016-01-17) x86_64 GNU/Linux）を含む現在のマイナーバージョン（8.3）に更新しました。それ以来、以前は問題にならなかったインターネットに接続できません。同じイーサネットケーブルとポートをMacbookまたは古いCentOSコンピュータに接続すると（DHCPを使用して）すばやくインターネットに接続できるため、問題はDebian設定にあることに違いありません。しかし、どうすればいいのかわかりません。 DHCPまたは固定IP（他のコンピュータでDHCPを介して取得したIPアドレスと設定を使用）および/ifupdownまたは複数の再起動をさまざまな組み合わせで試しましたが、network-manager役に立ちませんでした。 DHCP は自動的に失敗したか、リースを取得できなかったというメッセージを表示します。静的IPを使用すると、イーサネットデバイスが接続されているように見えますが、実際にはインターネットに接続されていません。この問題を解決する方法についてのアイデアはありますか？
/var/log/dmesgeth1編集：潜在的に関連しているように見える[正しいポートです]の行は次のとおりです。
[ 16.480813] ADDRCONF(NETDEV_UP): eth1: link is not ready
[ 18.031149] tg3 0000:08:00.0: eth1: Link is up at 100 Mbps, full duplex
[ 18.031151] tg3 0000:08:00.0: eth1: Flow control is off for TX and off for RX
[ 18.031881] ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
[ 28.240006] eth1: no IPv6 routers present
出力nmcli -p -f general device show eth1：
===============================================================================
Device details (eth1)
===============================================================================
GENERAL.DEVICE: eth1
GENERAL.TYPE: ethernet
GENERAL.VENDOR: Broadcom Corporation
GENERAL.PRODUCT: NetXtreme BCM5754 Gigabit Ethernet PCI Express (Precision T5400)
GENERAL.DRIVER: tg3
GENERAL.DRIVER-VERSION: 3.137
GENERAL.FIRMWARE-VERSION: 5754-v3.24
GENERAL.HWADDR: 00:21:9B:41:28:86
GENERAL.MTU: 1500
GENERAL.STATE: 100 (connected)
GENERAL.REASON: 0 (No reason given)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.0/0000:08:00.0/net/eth1
GENERAL.IP-IFACE: eth1
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.CONNECTION: eth1
GENERAL.CON-UUID: c81bfd1d-5dad-4ba0-9160-b6dba7ea325a
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/2
出力ethtool eth1：
Settings for eth1:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: Yes
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Link partner advertised pause frame use: No
Link partner advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: off
Supports Wake-on: g
Wake-on: g
Current message level: 0x000000ff (255)
drv probe link timer ifdown ifup rx_err tx_err
Link detected: yes
出力lsmod | grep tg3：
tg3 164481 0
ptp 17692 1 tg3
libphy 32268 1 tg3
出力lspci | grep -i ethernet：
08:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5754 Gigabit Ethernet PCI Express (rev 02)
出力cat /var/log/kern.log | grep -i tg：
May 15 12:00:14 kernel: [ 2.587463] tg3.c:v3.116 (December 3, 2010)
May 15 12:00:14 kernel: [ 2.587482] tg3 0000:08:00.0: PCI INT A -> GSI
16 (level, low) -> IRQ 16
May 15 12:00:14 kernel: [ 2.587491] tg3 0000:08:00.0: setting latency
timer to 64
May 15 12:00:14 kernel: [ 2.604699] tg3 0000:08:00.0: eth0: Tigon3 [pa
rtno(BCM95754) rev b002] (PCI Express) MAC address 00:21:9b:41:28:86
May 15 12:00:14 kernel: [ 2.604702] tg3 0000:08:00.0: eth0: attached P
HY is 5787 (10/100/1000Base-T Ethernet) (WireSpeed[1])
May 15 12:00:14 kernel: [ 2.604704] tg3 0000:08:00.0: eth0: RXcsums[1]
LinkChgREG[0] MIirq[0] ASF[0] TSOcap[1]
May 15 12:00:14 kernel: [ 2.604706] tg3 0000:08:00.0: eth0: dma_rwctrl
[76180000] dma_mask[64-bit]
May 15 12:00:14 kernel: [ 13.668551] tg3 0000:08:00.0: irq 78 for MSI/M
SI-X
May 15 12:00:14 kernel: [ 15.265188] tg3 0000:08:00.0: eth1: Link is up
at 100 Mbps, full duplex
May 15 12:00:14 kernel: [ 15.265190] tg3 0000:08:00.0: eth1: Flow contr
ol is off for TX and off for RX
出力ethtool -S eth1：
NIC statistics:
rx_octets: 1351463
rx_fragments: 0
rx_ucast_packets: 0
rx_mcast_packets: 1051
rx_bcast_packets: 8167
rx_fcs_errors: 0
rx_align_errors: 0
rx_xon_pause_rcvd: 0
rx_xoff_pause_rcvd: 0
rx_mac_ctrl_rcvd: 0
rx_xoff_entered: 0
rx_frame_too_long_errors: 0
rx_jabbers: 0
rx_undersize_packets: 0
rx_in_length_errors: 0
rx_out_length_errors: 0
rx_64_or_less_octet_packets: 0
rx_65_to_127_octet_packets: 0
rx_128_to_255_octet_packets: 0
rx_256_to_511_octet_packets: 0
rx_512_to_1023_octet_packets: 0
rx_1024_to_1522_octet_packets: 0
rx_1523_to_2047_octet_packets: 0
rx_2048_to_4095_octet_packets: 0
rx_4096_to_8191_octet_packets: 0
rx_8192_to_9022_octet_packets: 0
tx_octets: 106305
tx_collisions: 0
tx_xon_sent: 0
tx_xoff_sent: 0
tx_flow_control: 0
tx_mac_errors: 0
tx_single_collisions: 0
tx_mult_collisions: 0
tx_deferred: 0
tx_excessive_collisions: 0
tx_late_collisions: 0
tx_collide_2times: 0
tx_collide_3times: 0
tx_collide_4times: 0
tx_collide_5times: 0
tx_collide_6times: 0
tx_collide_7times: 0
tx_collide_8times: 0
tx_collide_9times: 0
tx_collide_10times: 0
tx_collide_11times: 0
tx_collide_12times: 0
tx_collide_13times: 0
tx_collide_14times: 0
tx_collide_15times: 0
tx_ucast_packets: 492
tx_mcast_packets: 30
tx_bcast_packets: 995
tx_carrier_sense_errors: 0
tx_discards: 0
tx_errors: 0
dma_writeq_full: 0
dma_write_prioq_full: 0
rxbds_empty: 0
rx_discards: 0
rx_errors: 0
rx_threshold_hit: 0
dma_readq_full: 0
dma_read_prioq_full: 0
tx_comp_queue_full: 0
ring_set_send_prod_index: 0
ring_status_update: 0
nic_irqs: 0
nic_avoided_irqs: 0
nic_tx_threshold_hit: 0
mbuf_lwm_thresh_hit: 0
出力iptables -vL：
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
答え1
1）rc.localにechoをルートタイプとして追加して、起動時にresolv.confを再構築してみてください。
echo "nameserver ip.addres.of.dns" > /etc/resolv.conf
ip.addres.of.dns = ip_router
2) インターフェースファイルのバックアップ
sudo cp /etc/network/interfaces /etc/network/interfaces.copy
編集する/etc/network/interfaces
（はい）と同じ：
/etc/network/interfaces# This file describes the network interfaces available o$
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 91.121.0.0
netmask 255.255.255.0
network 91.121.0.0
broadcast 91.121.0.255
gateway 91.121.0.254
dns-nameservers 8.8.8.8 8.8.4.4
アップデート：IPV6の例の場合：
iface eth0 inet6 static
address 2001:db8::c0ca:1eaf
netmask 64
gateway 2001:db8::1ead:ed:beef
ネットワークを再起動します。
sudo service networking restart