роутер524т постоянно обрывает связь,прошивка последняя ,провайдер(авнгард)все проверили сказали ,что роутер сам закрывает сессию.Интервалы бывает~раз в два часа ,а бывает~раз в 10 минут
Jan 1 16:23:43> pingStat 2, oamHdr 800330 result 0
Jan 1 16:23:43> pingStat 2, oamHdr 8003B0 result 0
Jan 1 16:23:43> get 0xF at Addr 0xA30085B0
Jan 1 16:23:43> ppp0
Jan 1 16:23:43> pppd 2.4.3 started by root, uid 0
Jan 1 16:23:44> Connect: ppp0 {--} nas0
Jan 1 16:23:44> PAP authentication succeeded
Jan 1 16:23:44> peer from calling number 00:90:1A:41:FC:02 authorized
Jan 1 16:23:44> ppp0
Jan 1 16:23:44> PPPoE Connect with IP Address 91.122.14.91
Jan 1 16:23:44> PPPoE Connection Successfully Established
Jan 1 16:23:44> PPPoE Connect with Gateway IP Address: 89.110.20.1
Jan 1 16:23:44> WAN IP address 91.122.14.91
Jan 1 16:23:44> WAN gateway 89.110.20.1
Jan 1 16:23:44> primary DNS address 212.48.193.38
Jan 1 16:23:44> secondary DNS address 212.48.193.36
Jan 1 16:32:55> DSL out of sync
Jan 1 16:33:12> DSL Carrier is down
Jan 1 16:33:15> DSL in Sync

Jan 1 16:33:22> DSL Carrier is up
Jan 1 16:33:22> sar read trained mode (1)(ADSL_G.dmt)
Jan 1 16:33:23> pingStat 2, oamHdr 230 result 0
Jan 1 16:33:23> pingStat 2, oamHdr 200 result 0
Jan 1 16:33:23> pingStat 2, oamHdr 280 result 0
Jan 1 16:33:23> pingStat 2, oamHdr 240 result 0
Jan 1 16:33:23> pingStat 2, oamHdr 260 result 0
Jan 1 16:33:23> pingStat 2, oamHdr 600 result 0
Jan 1 16:33:23> pingStat 2, oamHdr 230 result 0
Jan 1 16:33:23> pingStat 2, oamHdr 800230 result 0
Jan 1 16:33:23> pingStat 2, oamHdr 2B0 result 0
Jan 1 16:33:23> pingStat 2, oamHdr 330 result 0
Jan 1 16:33:23> pingStat 2, oamHdr 3B0 result 0
Jan 1 16:33:23> pingStat 2, oamHdr 8002B0 result 0
Jan 1 16:33:23> pingStat 2, oamHdr 800330 result 0
Jan 1 16:33:23> pingStat 2, oamHdr 8003B0 result 0
Jan 1 16:33:23> get 0xF at Addr 0xA30085B0
Jan 1 16:33:23> ppp0
Jan 1 16:33:28> Terminated: Modem Hang-Up

Jan 1 16:33:28> Modem hangup
Jan 1 16:33:28> pppd 2.4.3 started by root, uid 0
Jan 1 16:33:42> DSL Carrier is down
Jan 1 16:33:44> DSL in Sync
Jan 1 16:33:52> DSL Carrier is up
Jan 1 16:33:52> sar read trained mode (1)(ADSL_G.dmt)
Jan 1 16:33:52> pingStat 2, oamHdr 230 result 0
Jan 1 16:33:52> pingStat 2, oamHdr 200 result 0
Jan 1 16:33:52> pingStat 2, oamHdr 280 result 0
Jan 1 16:33:52> pingStat 2, oamHdr 240 result 0
Jan 1 16:33:52> pingStat 2, oamHdr 260 result 0
Jan 1 16:33:52> pingStat 2, oamHdr 600 result 0
Jan 1 16:33:52> pingStat 2, oamHdr 230 result 0
Jan 1 16:33:52> pingStat 2, oamHdr 800230 result 0
Jan 1 16:33:52> pingStat 2, oamHdr 2B0 result 0
Jan 1 16:33:52> pingStat 2, oamHdr 330 result 0
Jan 1 16:33:52> pingStat 2, oamHdr 3B0 result 0
Jan 1 16:33:52> pingStat 2, oamHdr 8002B0 result 0
Jan 1 16:33:52> pingStat 2, oamHdr 800330 result 0

Jan 1 16:33:52> get 0xF at Addr 0xA30085B0
Jan 1 16:33:52> pppd 2.4.3 started by root, uid 0
Jan 1 16:34:27> Timeout waiting for PADO packets
Jan 1 16:34:27> Unable to complete PPPoE Discovery
Jan 1 16:34:27> PPPD Successfully Launched
Jan 1 16:34:29> pppd 2.4.3 started by root, uid 0
Jan 1 16:35:04> PPPD Successfully Launched
Jan 1 16:35:04> Timeout waiting for PADO packets
Jan 1 16:35:05> Unable to complete PPPoE Discovery
Jan 1 16:35:05> pppd 2.4.3 started by root, uid 0
Jan 1 16:35:20> Connect: ppp0 {--} nas0
Jan 1 16:35:20> PAP authentication succeeded
Jan 1 16:35:20> peer from calling number 00:90:1A:41:FC:02 authorized
Jan 1 16:35:20> PPPoE Connect with IP Address 91.122.13.142
Jan 1 16:35:20> PPPoE Connection Successfully Established
Jan 1 16:35:20> PPPoE Connect with Gateway IP Address: 89.110.20.1
Jan 1 16:35:20> WAN IP address 91.122.13.142
Jan 1 16:35:20> WAN gateway 89.110.20.1
Jan 1 16:35:20> primary DNS address 212.48.193.38

Jan 1 12:00:12> DSL Polling Timer Started succesfully.
Jan 1 12:00:13> Firewall NAT service started
Jan 1 12:00:16> starting on port 80
Jan 1 12:00:16> (c)2000 Netfilter core team
Jan 1 12:00:16> netfilter PSD loaded - (c) astaro AG
Jan 1 12:00:16> Initializing the WAN Bridge.
Jan 1 12:00:16> Please set the MAC Address for the WAN Bridge.
Jan 1 12:00:16> Set the Environment variable 'wan_br_mac'.
Jan 1 12:00:16> xx.xx.xx.xx.xx.xx
Jan 1 12:00:16> Mounted root (squashfs filesystem) readonly.
Jan 1 12:00:16> Mounted devfs on /dev
Jan 1 12:00:16> 64k freed
Jan 1 12:00:16> Algorithmics/MIPS FPU Emulator v1.5
Jan 1 12:00:16> registered device TI Avalanche SAR
Jan 1 12:00:17> Sangam detected
Jan 1 12:00:17> DSP binary filesize = 356930 bytes
Jan 1 12:00:17> Setting mode to 0x87
Jan 1 12:00:17> version:[6.00.01.00]
Jan 1 12:00:17> Disable_igmp_snooping_register!!!

Судя по Вашему логу, происходит обрыв ADSL соединения. Попросите провайдера посмотреть статистику ошибок в свойствах Вашего DSL порта на DSLAM и настроить соответствующим образом профиль этого порта.

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С уважением, Давыдов Денис.