内网问题，其他机器上网都正常，就是这台机器，上网5秒就断线，关闭网络连接，开启网络连接正常5秒断线。TP-LINK路由器系统日志记载如下：  （该机器内网IP：192.168.1.113）                                   
100  0280:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

101  0294:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

102  0437:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

103  0646:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

104  1300:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

105  1679:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

106  1712:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

107  1813:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

108  1933:DHCPS: request(): cid=1:0x001731724efa; ip=192.168.1.8; send_dhcp(ACK) done.

109  3009:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

110  3013:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

111  3041:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

112  3190:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

113  3235:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

114  3238:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

115  3253:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

116  3275:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

117  3278:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

118  3475:DHCPS: request(): cid=1:0x0015003c99dd; ip=192.168.1.6; send_dhcp(ACK) done.

119  3476:DHCPS: decline(): cid=1:0x0015003c99dd; done.

120  3486:DHCPS: request(): cid=1:0x0015003c99dd; ip=192.168.1.9; send_dhcp(ACK) done.

121  3935:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

122  3939:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

123  3969:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

124  4055:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

125  4140:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

126  4161:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

127  4181:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

128  4210:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

129  4213:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

130  4221:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

131  4335:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

132  4423:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

133  4446:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

134  4578:DHCPS: request(): cid=1:0x0013cecabe8c; ip=192.168.1.11; send_dhcp(ACK) done.

135  4740:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.

136  4910:DHCPS: request(): cid=1:0x0014784a4161; ip=192.168.1.113; send_dhcp(ACK) done.


Time = 2007-07-10 9:49:58 5138s
H-Ver = WR541G/542G v2 00000000 : S-Ver = 2.10.0 Build 060119 Rel.32618n 
L = 192.168.1.1 : M = 255.255.255.0
Mode = PPPoE : W = 58.252.42.65 : M = 255.0.0.0 : G = 58.252.42.65
Free=5436, Busy=667, Bind=220, Inv=0/20, Bc=0/5, Dns=19, cl=95, fc=0/0, sq=0/0

是什么问题，请指教！谢谢！