l2tp подключается но не чего не пингуется

ifconfig 
eth0      Link encap:Ethernet  HWaddr 00:50:8d:91:74:32  
          inet addr:10.64.116.112  Bcast:10.64.117.255  Mask:255.255.254.0
          inet6 addr: fe80::250:8dff:fe91:7432/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:45472 errors:0 dropped:0 overruns:0 frame:0
          TX packets:18912 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:16871900 (16.0 MiB)  TX bytes:2679155 (2.5 MiB)
          Interrupt:44 Base address:0x2000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:1889 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1889 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:331050 (323.2 KiB)  TX bytes:331050 (323.2 KiB)

ppp0      Link encap:Point-to-Point Protocol  
          inet addr:91.203.66.125  P-t-P:10.100.0.1  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1460  Metric:1
          RX packets:4 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8524503 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3 
          RX bytes:40 (40.0 B)  TX bytes:3784639530 (3.5 GiB)
route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         10.100.0.1      0.0.0.0         UG    0      0        0 ppp0
0.0.0.0         10.64.117.254   0.0.0.0         UG    202    0        0 eth0
10.64.116.0     0.0.0.0         255.255.254.0   U     202    0        0 eth0
10.100.0.1      0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo

Думаю косяк именно в маршрутах

Ну и логи:

[xl2tpd] Connecting to host 172.31.1.246, port 1701_
Mar 12 13:51:13 [xl2tpd] Connection established to 172.31.1.246, 1701.  Local: 25894, Remote: 52139 (ref=0/0)._
Mar 12 13:51:13 [xl2tpd] Calling on tunnel 25894_
Mar 12 13:51:13 [xl2tpd] Call established with 172.31.1.246, Local: 32867, Remote: 3394, Serial: 1 (ref=0/0)_
Mar 12 13:51:13 [pppd] pppd 2.4.5 started by chipset, uid 0
Mar 12 13:51:13 [pppd] Using interface ppp0
Mar 12 13:51:13 [pppd] Connect: ppp0 <--> /dev/pts/4
Mar 12 13:51:13 [pppd] CHAP authentication succeeded
                - Last output repeated twice -
Mar 12 13:51:13 [dhcpcd] ppp0: sending IPv6 Router Solicitation
Mar 12 13:51:13 [dhcpcd] ppp0: sendmsg: Network is unreachable
Mar 12 13:51:13 [dhcpcd] ppp0: waiting for 3rd party to configure IP address
Mar 12 13:51:13 [pppd] local  IP address 91.203.66.125
Mar 12 13:51:13 [pppd] remote IP address 10.100.0.1
Mar 12 13:51:13 [dhcpcd] ppp0: removing IP address 0.0.0.0/0
Mar 12 13:51:13 [bcrelay] Active interface set changed to: eth0(0/2/5) ppp0(1/43/6) 
Mar 12 13:51:16 [bcrelay] UDP_BroadCast(sp=67,dp=68) from: eth0 relayed to: ppp0 
                - Last output repeated twice -
Mar 12 13:51:17 [dhcpcd] ppp0: sending IPv6 Router Solicitation
Mar 12 13:51:17 [dhcpcd] ppp0: sendmsg: Network is unreachable
Mar 12 13:51:21 [dhcpcd] ppp0: sending IPv6 Router Solicitation
Mar 12 13:51:21 [dhcpcd] ppp0: sendmsg: Network is unreachable
Mar 12 13:51:25 [dhcpcd] ppp0: sending IPv6 Router Solicitation
Mar 12 13:51:25 [dhcpcd] ppp0: sendmsg: Network is unreachable
Mar 12 13:51:25 [dhcpcd] ppp0: no IPv6 Routers available
Mar 12 13:51:26 [bcrelay] UDP_BroadCast(sp=68,dp=67) from: eth0 relayed to: ppp0 
Mar 12 13:51:30 [bcrelay] UDP_BroadCast(sp=67,dp=68) from: eth0 relayed to: ppp0 
                - Last output repeated twice -
Mar 12 13:51:30 [bcrelay] ignored ENOBUFS from sendto(), temporary shortage of buffer memory
Mar 12 13:51:30 [bcrelay] UDP_BroadCast(sp=67,dp=68) from: eth0 relayed to: ppp0 
Mar 12 13:51:30 [bcrelay] ignored ENOBUFS from sendto(), temporary shortage of buffer memory
Mar 12 13:51:30 [bcrelay] UDP_BroadCast(sp=67,dp=68) from: eth0 relayed to: ppp0 
Mar 12 13:51:34 [bcrelay] ignored ENOBUFS from sendto(), temporary shortage of buffer memory
Mar 12 13:51:34 [bcrelay] UDP_BroadCast(sp=67,dp=68) from: eth0 relayed to: ppp0 
Mar 12 13:51:34 [bcrelay] ignored ENOBUFS from sendto(), temporary shortage of buffer memory
Mar 12 13:51:34 [bcrelay] UDP_BroadCast(sp=67,dp=68) from: eth0 relayed to: ppp0 
Mar 12 13:51:41 [bcrelay] UDP_BroadCast(sp=68,dp=67) from: eth0 relayed to: ppp0 
Mar 12 13:51:41 [bcrelay] UDP_BroadCast(sp=67,dp=68) from: eth0 relayed to: ppp0 
                - Last output repeated twice -
Mar 12 13:51:45 [bcrelay] UDP_BroadCast(sp=68,dp=67) from: eth0 relayed to: ppp0 
                - Last output repeated twice -
Mar 12 13:51:53 [bcrelay] UDP_BroadCast(sp=67,dp=68) from: eth0 relayed to: ppp0 
Mar 12 13:51:57 [bcrelay] UDP_BroadCast(sp=68,dp=67) from: eth0 relayed to: ppp0 
                - Last output repeated twice -
Mar 12 13:52:12 [bcrelay] UDP_BroadCast(sp=67,dp=68) from: eth0 relayed to: ppp0 
Mar 12 13:52:26 [bcrelay] ignored ENOBUFS from sendto(), temporary shortage of buffer memory
Mar 12 13:52:26 [bcrelay] UDP_BroadCast(sp=67,dp=68) from: eth0 relayed to: ppp0 
Mar 12 13:52:30 [bcrelay] UDP_BroadCast(sp=68,dp=67) from: eth0 relayed to: ppp0 
Mar 12 13:52:42 [bcrelay] UDP_BroadCast(sp=67,dp=68) from: eth0 relayed to: ppp0 
                - Last output repeated 2 times -
Mar 12 13:53:35 [bcrelay] UDP_BroadCast(sp=68,dp=67) from: eth0 relayed to: ppp0 
Mar 12 13:53:52 [bcrelay] ignored ENOBUFS from sendto(), temporary shortage of buffer memory
Mar 12 13:53:52 [bcrelay] UDP_BroadCast(sp=67,dp=68) from: eth0 relayed to: ppp0

Лучше покажите xl2tpd.conf и

Лучше покажите xl2tpd.conf и опции для ppp (по умолчанию они вроде в файле /etc/ppp/options.xl2tp).

Пробуйте убрать опцию defaultroute из options.xl2tp.
У вас похоже xl2tpd подвис и "закольцевал" сам себя. на интерфейсе ppp0 переданных пакетов на 3,5 гигабайта.
Подозреваю, что defaultroute неправильный и мешает.

Я когда настраивал себе IPsec/L2TP в конце-концов свел весь файл options.xl2tpd на клиенте к одной строке

name

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