L2TP fails to connect with error:" failed to write L2TP session params to kernel"

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Technical Level

Solution ID	sk167636
Technical Level
Product	IPSec VPN
Version	R80.30, R80.20, R80.40, R80.10 (EOL)
OS	Gaia
Date Created	25-Jun-2020
Last Modified	07-Oct-2020

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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