何らかの理由で私のミニコンピュータにIPアドレスがないため、次のsudo ifdown eth2コマンドを実行しましたsudo ifup eth2。続いたのは5分間の望む対決でした。私の顧客は誰がより頑固であるかを知るためにサーバーと戦った。最後にIPアドレスを取得しましたが、要求したIPアドレスは取得できませんでした。この戦いの原因は何であり、これを防ぐためにどのように再構成する必要がありますか？
dhclient.confログ出力に従います。
Nov 5 14:23:36 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 6 (xid=0x1c08c5d8)
Nov 5 14:23:42 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 12 (xid=0x1c08c5d8)
Nov 5 14:23:54 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 7 (xid=0x1c08c5d8)
Nov 5 14:23:56 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x1c08c5d8)
Nov 5 14:23:56 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:23:56 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x1c08c5d8)
Nov 5 14:23:56 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x19021763)
Nov 5 14:23:56 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x19021763)
Nov 5 14:23:56 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:23:56 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x19021763)
Nov 5 14:23:59 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x19021763)
Nov 5 14:23:59 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x19021763)
Nov 5 14:24:04 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x19021763)
Nov 5 14:24:04 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x19021763)
Nov 5 14:24:11 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x37e59f2f)
Nov 5 14:24:11 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x37e59f2f)
Nov 5 14:24:11 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:24:11 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x37e59f2f)
Nov 5 14:24:14 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x37e59f2f)
Nov 5 14:24:14 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x37e59f2f)
Nov 5 14:24:17 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x37e59f2f)
Nov 5 14:24:17 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x37e59f2f)
Nov 5 14:24:24 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x41702f49)
Nov 5 14:24:27 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 6 (xid=0x41702f49)
Nov 5 14:24:27 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x41702f49)
Nov 5 14:24:27 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:24:27 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x41702f49)
Nov 5 14:24:30 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x41702f49)
Nov 5 14:24:30 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x41702f49)
Nov 5 14:24:33 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x41702f49)
Nov 5 14:24:33 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x41702f49)
Nov 5 14:24:41 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x43246040)
Nov 5 14:24:41 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x43246040)
Nov 5 14:24:41 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:24:41 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x43246040)
Nov 5 14:24:44 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x43246040)
Nov 5 14:24:44 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x43246040)
Nov 5 14:24:51 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x43246040)
Nov 5 14:24:51 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x43246040)
Nov 5 14:25:00 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x6caca5f6)
Nov 5 14:25:01 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x6caca5f6)
Nov 5 14:25:01 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:25:01 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x6caca5f6)
Nov 5 14:25:04 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x6caca5f6)
Nov 5 14:25:04 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x6caca5f6)
Nov 5 14:25:11 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x6caca5f6)
Nov 5 14:25:11 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x6caca5f6)
Nov 5 14:25:19 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x1f6963d4)
Nov 5 14:25:19 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x1f6963d4)
Nov 5 14:25:19 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:25:19 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x1f6963d4)
Nov 5 14:25:22 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x1f6963d4)
Nov 5 14:25:22 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x1f6963d4)
Nov 5 14:25:30 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x7c056f7e)
Nov 5 14:25:31 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x7c056f7e)
Nov 5 14:25:31 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:25:31 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x7c056f7e)
Nov 5 14:25:34 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x7c056f7e)
Nov 5 14:25:34 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x7c056f7e)
Nov 5 14:25:39 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x7c056f7e)
Nov 5 14:25:39 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x7c056f7e)
Nov 5 14:25:48 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0xab17b6d)
Nov 5 14:25:48 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0xab17b6d)
Nov 5 14:25:48 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:25:48 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0xab17b6d)
Nov 5 14:25:51 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0xab17b6d)
Nov 5 14:25:51 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0xab17b6d)
Nov 5 14:25:54 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0xab17b6d)
Nov 5 14:25:54 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0xab17b6d)
Nov 5 14:25:58 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0xab17b6d)
Nov 5 14:25:58 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0xab17b6d)
Nov 5 14:26:07 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x7c7ee3b0)
Nov 5 14:26:07 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x7c7ee3b0)
Nov 5 14:26:07 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:26:07 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x7c7ee3b0)
Nov 5 14:26:10 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x7c7ee3b0)
Nov 5 14:26:10 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x7c7ee3b0)
Nov 5 14:26:18 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x7a8ec50)
Nov 5 14:26:18 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x7a8ec50)
Nov 5 14:26:18 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:26:18 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x7a8ec50)
Nov 5 14:26:21 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x7a8ec50)
Nov 5 14:26:21 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x7a8ec50)
Nov 5 14:26:29 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x53e10240)
Nov 5 14:26:29 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x53e10240)
Nov 5 14:26:29 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:26:29 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x53e10240)
Nov 5 14:26:32 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x53e10240)
Nov 5 14:26:32 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x53e10240)
Nov 5 14:26:40 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x3920325e)
Nov 5 14:26:40 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x3920325e)
Nov 5 14:26:40 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:26:40 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x3920325e)
Nov 5 14:26:43 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x3920325e)
Nov 5 14:26:51 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x296d0094)
Nov 5 14:26:51 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x296d0094)
Nov 5 14:26:51 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:26:51 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x296d0094)
Nov 5 14:26:54 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x296d0094)
Nov 5 14:26:54 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x296d0094)
Nov 5 14:26:58 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x296d0094)
Nov 5 14:26:58 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x296d0094)
Nov 5 14:27:09 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x62ff65c6)
Nov 5 14:27:09 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x62ff65c6)
Nov 5 14:27:09 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:27:09 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x62ff65c6)
Nov 5 14:27:12 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x62ff65c6)
Nov 5 14:27:12 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x62ff65c6)
Nov 5 14:27:19 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x62ff65c6)
Nov 5 14:27:19 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x62ff65c6)
Nov 5 14:27:31 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x3c915dc9)
Nov 5 14:27:31 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x3c915dc9)
Nov 5 14:27:31 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:27:31 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x3c915dc9)
Nov 5 14:27:34 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x3c915dc9)
Nov 5 14:27:35 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x3c915dc9)
Nov 5 14:27:39 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x3c915dc9)
Nov 5 14:27:39 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x3c915dc9)
Nov 5 14:27:49 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x68eff7c8)
Nov 5 14:27:49 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x68eff7c8)
Nov 5 14:27:49 nvidia dhclient: DHCPOFFER of 172.20.40.71 from 172.20.40.1
Nov 5 14:27:49 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x68eff7c8)
Nov 5 14:27:52 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x68eff7c8)
Nov 5 14:27:52 nvidia dhclient: DHCPNAK from 172.20.40.1 (xid=0x68eff7c8)
Nov 5 14:27:56 nvidia dhclient: DHCPREQUEST of 172.20.40.71 on eth2 to 255.255.255.255 port 67 (xid=0x68eff7c8)
Nov 5 14:28:04 nvidia dhclient: DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x53f01e35)
Nov 5 14:28:06 nvidia dhclient: DHCPREQUEST of 172.20.44.15 on eth2 to 255.255.255.255 port 67 (xid=0x53f01e35)
Nov 5 14:28:06 nvidia dhclient: DHCPOFFER of 172.20.44.15 from 172.20.40.1
Nov 5 14:28:06 nvidia dhclient: DHCPACK of 172.20.44.15 from 172.20.40.1
Nov 5 14:28:06 nvidia dhclient: bound to 172.20.44.15 -- renewal in 1733 seconds.
ここにありますdhclient.conf（ほとんどのコメント行は削除されます）。
# Configuration file for /sbin/dhclient, which is included in Debian's
# dhcp3-client package.
option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;
send host-name = gethostname();
send dhcp-requested-address 172.20.44.15;
request subnet-mask, broadcast-address, time-offset, routers,
domain-name, domain-name-servers, domain-search, host-name,
dhcp6.name-servers, dhcp6.domain-search,
netbios-name-servers, netbios-scope, interface-mtu,
rfc3442-classless-static-routes, ntp-servers,
dhcp6.fqdn, dhcp6.sntp-servers;
答え1
毎回このようなことが起こるのでしょうか？
DHCPサーバーがインターフェイスeth0にアドレス172.20.44.71を提供しようとしましたが、拒否されたようです。その後、サーバーがアドレス172.20.44.15を提供すると、そのアドレスを受け入れるDHCPACKがあります。
構成ファイルには次の行があります。
DHCP 要求アドレス 172.20.44.15 送信;
このIPアドレスは本当に必要ですか/使用したいですか？この行を削除していくつかのテストを実行しましたか？