Yosemite IPsec L2TP wrong router IP

Since upgrading from Maverick to Yosemite, IPsec L2TP connections seem to be setup wrong. Data delivered in the local network works, but data that should be routed through the gateway is being dropped. When looking at control panel Network -> Advanced -> TCP/IP when the tunnel is up I see difference between both OS versions.
Mavericks: IP address 10.1.2.2, router IP 10.1.2.1 (working)
Yosemite: IP address 10.1.2.2, router IP 10.1.2.2 (no routing at all working)
In my setup I require that 'Send all traffic over VPN connection' is off and manual routing is automatically added (see http://superuser.com/questions/4904/how-to-selectively-route-network-traffic-thr ough-vpn-on-mac-os-x-leopard).
I have deleted and recreated the VPN connections and it worked for a short while until I had to reboot.
Andre

Pulling up the routing tables, the differences are clear:
Mavericks routing with IPsec L2TP VPN
Destination        Gateway            Flags        Refs      Use  Netif Expire
default            10.0.0.1          UGSc          22        0    en0
default            10.1.2.1          UGScI          2        0    ppp0
10/24              link#4            UCS            4        0    en0
10.0.0.136        127.0.0.1          UHS            0      66    lo0
10.1.2/24          ppp0              USc            0        0    ppp0
10.1.2.1          10.1.2.2          UHr            5    1577    ppp0
xx.xx.xx.226      10.0.0.1          UGHS            0        0    en0
Yosemite routing with IPsec L2TP VPN
Destination        Gateway            Flags        Refs      Use  Netif Expire
default          10.0.0.1          UGSc          89        0    en3
default            link#12            UCSI            0        0    ppp0
10/24              link#10            UCS            5        0    en3
10.0.0.1/32        link#10            UCS            2        0    en3
10.0.0.101/32      link#10            UCS            1        0    en3
10.1.1/24          10.1.2.1          UGSc            0        0    ppp0
10.1.2/24          ppp0              USc            0        0    ppp0
10.1.2.1          10.1.2.3          UH            40      481    ppp0
10.1.128/24        10.1.2.1          UGSc            0        0    ppp0
xx.xx.xx.226      10.0.0.1          UGHS            0        0    en3

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         64.0.0.0/32 is subnetted, 1 subnets
    O E2    64.59.135.150 [110/300] via 192.168.99.2, 1d09h, FastEthernet0
         4.0.0.0/32 is subnetted, 1 subnets
    O       4.4.4.4 [110/3] via 192.168.99.2, 3d17h, FastEthernet0
    O    192.168.10.0/24 [110/2] via 192.168.99.2, 3d17h, FastEthernet0
         172.31.0.0/24 is subnetted, 4 subnets
    O E2    172.31.3.0 [110/300] via 192.168.99.2, 3d17h, FastEthernet0
    O E2    172.31.2.0 [110/300] via 192.168.99.2, 3d17h, FastEthernet0
    O E2    172.31.1.0 [110/300] via 192.168.99.2, 3d17h, FastEthernet0
    O E2    172.31.0.0 [110/300] via 192.168.99.2, 3d17h, FastEthernet0
    O    192.168.11.0/24 [110/4] via 192.168.99.2, 3d17h, FastEthernet0
    C    192.168.98.0/24 is directly connected, BVI98
    C    192.168.99.0/24 is directly connected, FastEthernet0
    O    192.168.20.0/24 [110/2] via 192.168.99.2, 3d17h, FastEthernet0
         192.168.5.0/31 is subnetted, 1 subnets
    O       192.168.5.2 [110/2] via 192.168.99.2, 3d17h, FastEthernet0
         192.168.6.0/31 is subnetted, 1 subnets
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    O    192.168.1.0/24 [110/14] via 192.168.99.2, 3d17h, FastEthernet0
    O*E2 0.0.0.0/0 [110/1] via 192.168.99.2, 1d09h, FastEthernet0
    Thanks
    Mahesh

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    Cons:
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    Olivier

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