WANFailover Dual WAN Failover Script

[rlj2]

WAN0TARGET="$(nvram get wan0_dns | awk '{print $1}')"
WAN1TARGET="$(nvram get wan1_gateway)"

My wife is using internet.. When I can ill do a sh +x, and kill my primary line see if I can see something.

 

[Ranger802004]

WAN0TARGET="$(nvram get wan0_dns | awk '{print $1}')"
WAN1TARGET="$(nvram get wan1_gateway)"

Send your script over and let me take a look, somewhere it is trying to grep but doesn’t have a parameter set like -e? Perhaps the script status check at the top?

 

[rlj2]

Send your script over and let me take a look, somewhere it is trying to grep but doesn’t have a parameter set like -e? Perhaps the script status check at the top?

If you run diff, youll see nothings really been changed.

 

[Ranger802004]

If you run diff, youll see nothings really been changed.

I’m not home atm, run diff and send me the output please.

 

[rlj2]

I’m not home atm, run diff and send me the output please.

admin@RT-AX86U-D7D0:/jffs/scripts# diff original wan2
--- original
+++ wan2
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh

# Author: Ranger802004
# Version 1.1
@@ -32,7 +32,7 @@
DNSRESOLVFILE="/tmp/resolv.conf"

#Ping Target for failure detections, must be routed over targeted interface
-WAN0TARGET="$(nvram get wan0_dns1_x)"
+WAN0TARGET="$(nvram get wan0_dns | awk '{print $1}')"
WAN1TARGET="$(nvram get wan1_gateway)"

#Ping count before WAN is considered down, requires 100% Packet Loss.
@@ -45,11 +45,11 @@

#QoS Manual Settings Variables
#QoS Inbound Bandwidth - Values are in Kbps
-WAN0_QOS_IBW=972800
-WAN1_QOS_IBW=97280
+WAN0_QOS_IBW=2972800
+WAN1_QOS_IBW=2297280
#QoS Outbound Bandwidth - Values are in Kbps
-WAN0_QOS_OBW=972800
-WAN1_QOS_OBW=5120
+WAN0_QOS_OBW=22972800
+WAN1_QOS_OBW=225120
#QoS WAN Packet Overhead - Values are in Bytes
WAN0_QOS_OVERHEAD=42
WAN1_QOS_OVERHEAD=18
@@ -311,7 +311,7 @@
# Trigger WAN Event
wanevent ()
{
-/jffs/scripts/wan-event
+#/jffs/scripts/wan-event
wanstatus
}
scriptstatus

 

[Ranger802004]

admin@RT-AX86U-D7D0:/jffs/scripts# diff original wan2
--- original
+++ wan2
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh

# Author: Ranger802004
# Version 1.1
@@ -32,7 +32,7 @@
DNSRESOLVFILE="/tmp/resolv.conf"

#Ping Target for failure detections, must be routed over targeted interface
-WAN0TARGET="$(nvram get wan0_dns1_x)"
+WAN0TARGET="$(nvram get wan0_dns | awk '{print $1}')"
WAN1TARGET="$(nvram get wan1_gateway)"

#Ping count before WAN is considered down, requires 100% Packet Loss.
@@ -45,11 +45,11 @@

#QoS Manual Settings Variables
#QoS Inbound Bandwidth - Values are in Kbps
-WAN0_QOS_IBW=972800
-WAN1_QOS_IBW=97280
+WAN0_QOS_IBW=2972800
+WAN1_QOS_IBW=2297280
#QoS Outbound Bandwidth - Values are in Kbps
-WAN0_QOS_OBW=972800
-WAN1_QOS_OBW=5120
+WAN0_QOS_OBW=22972800
+WAN1_QOS_OBW=225120
#QoS WAN Packet Overhead - Values are in Bytes
WAN0_QOS_OVERHEAD=42
WAN1_QOS_OVERHEAD=18
@@ -311,7 +311,7 @@
# Trigger WAN Event
wanevent ()
{
-/jffs/scripts/wan-event
+#/jffs/scripts/wan-event
wanstatus
}
scriptstatus

Did you change something with the ping count or timeout? Go ahead and run this command and send me the output.

nvram show | grep -e “wan”

 

[dave14305]

I bet I have another blank nvram setting that needs changed on Wan1.

You need wan1_dns populated, most likely.

 

[Ranger802004]

You need wan1_dns populated, most likely.

Shouldn’t unless he is targeting it for his ping target. The switch wan will check that variable and then go to dns1_x and dns2_x variables. Unless both of those are blank as well should be fine.

 

[rlj2]

Shouldn’t unless he is targeting it for his ping target. The switch wan will check that variable and then go to dns1_x and dns2_x variables. Unless both of those are blank as well should be fine.

@Ranger802004 and @dave14305 , right now I just have dual wan set in the UI, with nothing setup for ping,dns,etc while trying the script. Besides that ranger as you can see, i didnt change much at all in the script. I can give you the output of nvram if you tell me exactly what your looking for. wan1_dns points to the secondary modem ip right now. As does nvram get wan1_gateway

 

[Ranger802004]

@Ranger802004 and @dave14305 , right now I just have dual wan set in the UI, with nothing setup for ping,dns,etc while trying the script. Besides that ranger as you can see, i didnt change much at all in the script. I can give you the output of nvram if you tell me exactly what your looking for. wan1_dns points to the secondary modem ip right now. As does nvram get wan1_gateway

I’m just looking for if any of the variables used throughout the script are blank.

 

[dave14305]

@Ranger802004 and @dave14305 , right now I just have dual wan set in the UI, with nothing setup for ping,dns,etc while trying the script. Besides that ranger as you can see, i didnt change much at all in the script. I can give you the output of nvram if you tell me exactly what your looking for.

nvram show 2>/dev/null | grep -E "^wan[01]?_dns|^wan[01]?_ifname"

I’m just trying to understand your grep problem.

 

[rlj2]

nvram show 2>/dev/null | grep -E "^wan[01]?_dns|^wan[01]?_ifname"

I’m just trying to understand your grep problem.

I only saw it when it switch to wan1, but I cannot test failover for now.

admin@RT-AX86U-D7D0:/jffs/scripts# nvram show 2>/dev/null | grep -E "^wan[01]?_dns|^wan[01]?_ifname"
wan0_dns=1.1.1.1 8.8.8.8
wan0_dns1_x=1.1.1.1
wan0_dns2_x=
wan0_dnsenable_x=1
wan0_ifname=eth0
wan1_dns=192.168.10.1
wan1_dns1_x=1.1.1.1
wan1_dns2_x=
wan1_dnsenable_x=1
wan1_ifname=eth5
wan_dns=192.168.10.1
wan_dns1_x=1.1.1.1
wan_dns2_x=
wan_dnsenable_x=1
wan_ifname=eth5
wan_ifnames=eth0 eth5

 

[rlj2]

Did you change something with the ping count or timeout? Go ahead and run this command and send me the output.

nvram show | grep -e “wan”

I sent the diff, i didnt touch any of that.

admin@RT-AX86U-D7D0:/jffs/scripts# nvram show | grep -e “wan”
size: 74666 bytes (56406 left)
admin@RT-AX86U-D7D0:/jffs/scripts#

 

[Ranger802004]

I only saw it when it switch to wan1, but I cannot test failover for now.

admin@RT-AX86U-D7D0:/jffs/scripts# nvram show 2>/dev/null | grep -E "^wan[01]?_dns|^wan[01]?_ifname"
wan0_dns=1.1.1.1 8.8.8.8
wan0_dns1_x=1.1.1.1
wan0_dns2_x=
wan0_dnsenable_x=1
wan0_ifname=eth0
wan1_dns=192.168.10.1
wan1_dns1_x=1.1.1.1
wan1_dns2_x=
wan1_dnsenable_x=1
wan1_ifname=eth5
wan_dns=192.168.10.1
wan_dns1_x=1.1.1.1
wan_dns2_x=
wan_dnsenable_x=1
wan_ifname=eth5
wan_ifnames=eth0 eth5

I have a clue on the problem and can test and add some logic for it later, do this in the meantime and test, assign a second DNS server to your WAN1 interface and see if gets rid of the error.

 

[rlj2]

I have a clue on the problem and can test and add some logic for it later, do this in the meantime and test, assign a second DNS server to your WAN1 interface and see if gets rid of the error.

sorry but I assume, this will work for now?

admin@RT-AX86U-D7D0:/jffs/scripts# nvram set wan1_dns2_x=8.8.8.8
admin@RT-AX86U-D7D0:/jffs/scripts# nvram set wan0_dns2_x=8.8.8.8

 

[dave14305]

There seems to be a misplaced/misused & in the middle of the until condition in switchwan().

 

[Ranger802004]

sorry but I assume, this will work for now?

admin@RT-AX86U-D7D0:/jffs/scripts# nvram set wan1_dns2_x=8.8.8.8
admin@RT-AX86U-D7D0:/jffs/scripts# nvram set wan0_dns2_x=8.8.8.8

Yea should work as a temp fix until I can update the script this weekend.

 

[rlj2]

There seems to be a misplaced/misused & in the middle of the until condition in switchwan().

Is that what your seeing?

 

[dave14305]

View attachment 41335

Is that what your seeing?

Yes, maybe it needs to be &&, but I haven’t tried too hard to decipher that line.

 

[Ranger802004]

View attachment 41335

Is that what your seeing?

That should be correct, the first 2 conditions are together with the { ;} brackets and the second is a command to run with a single &