Hi All. I have an Asus AC1900 (RT-AC68U) router running asuswrt-merlin 386.3_2 sitting behind a separate Spectrum wireless router and a separate Spectrum cable modem.
The AC1900 connects and routes all traffic to an OpenVPN tunnel.
Per Spectrum, who recently updated my modem and router, I had to reduce the WAN MTU from 1500 down to 1479. This was easy. However, my tunnel became sluggish, with packet drops being frequent per various network tests. I _think_ I need to reduce the tunnel MTU too.
I don't see any UI options for modifying the tunnel VPN. I can set the mtu on "tun11" manually through SSH, but it will revert back to 1500 on restart of the device or when the tunnel renegotiates.
Can anyone point me in the right direction? I can post additional details/logs/settings if necessary.
Relevant log line:
Jan 2 07:35:53 ovpn-client1[28219]: /usr/sbin/ip link set dev tun11 up mtu 1500
The AC1900 connects and routes all traffic to an OpenVPN tunnel.
Per Spectrum, who recently updated my modem and router, I had to reduce the WAN MTU from 1500 down to 1479. This was easy. However, my tunnel became sluggish, with packet drops being frequent per various network tests. I _think_ I need to reduce the tunnel MTU too.
I don't see any UI options for modifying the tunnel VPN. I can set the mtu on "tun11" manually through SSH, but it will revert back to 1500 on restart of the device or when the tunnel renegotiates.
Can anyone point me in the right direction? I can post additional details/logs/settings if necessary.
Relevant log line:
Jan 2 07:35:53 ovpn-client1[28219]: /usr/sbin/ip link set dev tun11 up mtu 1500