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L2TP fails to connect with error:" failed to write L2TP session params to kernel" Technical Level
Symptoms
  • L2TP connection fails to connect.
  • See the following error in $FWDIR/log/vpnd.elg:
    [vpnd 15210 4093478816]@Fw1ChefCast[25 May 9:24:04][vpnd] L2TP_inbound_packet::interpret_contents: Got AVP_ATT_Receive_Window_Size: 8
    [vpnd 15210 4093478816]@Fw1ChefCast[25 May 9:24:04][vpnd] L2TP_packet_arrived: Control packet detected - sending to L2TP handler
    [vpnd 15210 4093478816]@Fw1ChefCast[25 May 9:24:04][vpnd] L2TP_control_packet_arrived: entering
    [vpnd 15210 4093478816]@Fw1ChefCast[25 May 9:24:04][SLP] L2TP_control_packet_arrived tunnelID: 00000000 00000000 00000000 00000000
    [vpnd 15210 4093478816]@Fw1ChefCast[25 May 9:24:04][vpnd] handle_SCCRQ: Entering...
    [vpnd 15210 4093478816]@Fw1ChefCast[25 May 9:24:04][vpnd] handle_SCCRQ: Searching for MSPI in 14 instances
    [vpnd 15210 4093478816]@Fw1ChefCast[25 May 9:24:04][vpnd] handle_SCCRQ: L2TP control connection found in instance 9, protected with MSPI 048000f8
    [vpnd 15210 4093478816]@Fw1ChefCast[25 May 9:24:04][vpnd] loadL2TPTunnel: Could not find tunnel <22bc2e9 6a5 4> in instances zero or 1
    [vpnd 15210 4093478816]@Fw1ChefCast[25 May 9:24:04][vpnd] find_available_tunnel_ID: Trying tunnel ID 14489 for peer 22bc2e9 with port 1701.
    [vpnd 15210 4093478816]@Fw1ChefCast[25 May 9:24:04][vpnd] loadL2TPTunnel: Could not find tunnel <22bc2e9 6a5 3899> in instances zero or 1
    [vpnd 15210 4093478816]@Fw1ChefCast[25 May 9:24:04][vpnd] handle_SCCRQ: Storing L2TP_cluster entry in all instances
    [vpnd 15210 4093478816]@Fw1ChefCast[25 May 9:24:04][vpnd] saveL2TPCluster: error - failed to write L2TP session params to kernel
Solution
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