问题描述：38 INFO 0098:Failed to connect to ISP server, maybe WAN port cable is unplugged. 37 INFO 0098:PPPOE: request timeout. 36 INFO 0098:发送PADI,请求建立连接. 35 INFO 0093:发送PADI,请求建立连接. 34 INFO 0090:发送PADI,请求建立连接. 33 INFO 0088:发送PADI,请求建立连接. 32 INFO 0088:PPPoE 开启自动连接. 31 INFO 0048:Failed to connect to ISP server, maybe WAN port cable is unplugged. 30 INFO 0048:PPPOE: request timeout. 29 INFO 0048:发送PADI,请求建立连接. 28 INFO 0044:发送PADI,请求建立连接. 27 INFO 0040:发送PADI,请求建立连接. 26 INFO 0038:发送PADI,请求建立连接. 25 INFO 0038:PPPoE 开启手动连接. 24 INFO 0037:Failed to connect to ISP server, maybe WAN port cable is unplugged. 23 INFO 0037:PPPOE: request timeout. 22 INFO 0037:发送PADI,请求建立连接. 21 INFO 0032:发送PADI,请求建立连接. 20 INFO 0029:发送PADI,请求建立连接. 19 INFO 0027:发送PADI,请求建立连接. 18 INFO 0027:PPPoE 开启按需连接. 17 INFO 0026:Failed to connect to ISP server, maybe WAN port cable is unplugged. 16 INFO 0026:PPPOE: request timeout. 15 INFO 0026:发送PADI,请求建立连接. 14 INFO 0021:发送PADI,请求建立连接. 13 INFO 0018:发送PADI,请求建立连接. 12 INFO 0016:发送PADI,请求建立连接. 11 INFO 0016:PPPoE 开启按需连接. 10 INFO 0015:Failed to connect to ISP server, maybe WAN port cable is unplugged. 9 INFO 0015:PPPOE: request timeout. 8 INFO 0015:发送PADI,请求建立连接. 7 INFO 0011:发送PADI,请求建立连接. 6 INFO 0007:发送PADI,请求建立连接. 5 INFO 0005:发送PADI,请求建立连接. 4 INFO 0005:PPPoE 开启按需连接. 3 INFO 0003:DHCPS: 1:0xd850e6c48376, 192.168.1.100, ACK in request. 2 INFO 0002:DHCPS: 1:0xd850e6c48376, NAK in request. 1 INFO 0000:系统启动成功. E3 DEBUG :(|2013-10-29 19:42:54 43607s| Tlb Load Exception Exception Program Counter: 0x801b348c Status Register: 0x0000f401 Cause Register: 0x00000008 Access Address : 0x00000014 Task: 0x80add440 "tHostapd" E2 DEBUG :(|2013-10-27 18:33:22 205497s| Tlb Load Exception Exception Program Counter: 0x801b348c Status Register: 0x0000f401 Cause Register: 0x00000008 Access Address : 0x00000014 Task: 0x80add440 "tHostapd" E1 DEBUG :(|2013-07-01 16:06:42 31663s| Tlb Load Exception Exception Program Counter: 0x801b348c Status Register: 0x0000f401 Cause Register: 0x00000008 Access Address : 0x00000014 Task: 0x80ade540 "tHostapd" Time = 2006-01-01 8:25:12 1513s H-Ver = WR740N 5.0/6.0 00000000 : S-Ver = 4.18.29 Build 110909 Rel.35946n L = 192.168.1.1 : M = 255.255.255.0 W1 = PPPoE : W = 0.0.0.0 : M = 0.0.0.0 : G = 0.0.0.0 Free=5011, Busy=19, Bind=17, Inv=0/12, Bc=0/0, Dns=276, cl=384, fc=0/0, sq=0/0