Difference between revisions of "Failover iproute2"
From MS Computech
| Line 3: | Line 3: | ||
---- | ---- | ||
| − | Wan1 up | + | '''Wan1 up''' |
<source lang=bash> | <source lang=bash> | ||
#!/bin/sh | #!/bin/sh | ||
| Line 15: | Line 15: | ||
</source> | </source> | ||
| − | Wan2 up | + | '''Wan2 up''' |
<source lang=bash> | <source lang=bash> | ||
#!/bin/sh | #!/bin/sh | ||
| Line 29: | Line 29: | ||
---- | ---- | ||
| + | '''Failover''' | ||
<source lang=bash> | <source lang=bash> | ||
#!/bin/sh | #!/bin/sh | ||
| Line 61: | Line 62: | ||
if [ "$RET" -ne "$PACKETS" ]; then | if [ "$RET" -ne "$PACKETS" ]; then | ||
if [ "$USINGWAN" = "1" ]; then | if [ "$USINGWAN" = "1" ]; then | ||
| − | / | + | /app/wan2.up |
USINGWAN=2 | USINGWAN=2 | ||
echo "Changed active WAN port to 2!" | echo "Changed active WAN port to 2!" | ||
else | else | ||
| − | / | + | /app/wan1.up |
USINGWAN=1 | USINGWAN=1 | ||
echo "Changed active WAN port to 2!" | echo "Changed active WAN port to 2!" | ||
Latest revision as of 19:35, 21 July 2009
iproute2 failover script
Wan1 up <source lang=bash>
- !/bin/sh
- WAN1
DEV=eth0 GATEWAY=192.168.101.1
ip route delete default
- ip route delete default
ip route add default via $GATEWAY dev $DEV </source>
Wan2 up <source lang=bash>
- !/bin/sh
- WAN2
DEV=eth1 GATEWAY=192.168.102.1
ip route delete default
- ip route delete default
ip route add default via $GATEWAY dev $DEV </source>
Failover <source lang=bash>
- !/bin/sh
INTERVAL=10 PACKETS=1 USINGWAN=0 WAN1=eth0 WAN2=eth1
- WAN1GW=`route -n | grep $WAN1 | grep '^0.0.0.0' | awk '{ print $2 }'`
- WAN2GW=`route -n | grep $WAN2 | grep '^0.0.0.0' | awk '{ print $2 }'`
WAN1GW=192.168.101.1 WAN2GW=192.168.101.2
- We'll run this in the intervals given above
while sleep $INTERVAL do
# Try to figure out the current route
TARGET=`ip route | awk '/default via/ {print $3}'`
# Set the variable, so let the script now which connection is it dealing with
if [ "$WAN1GW" = "$TARGET" ]; then
USINGWAN=1;
else if [ "$WAN2GW" = "$TARGET" ]; then
USINGWAN=2;
fi;
fi
# We'll ping as many times the $PACKETS variable tells, and test if we have connection:
RET=`ping -c $PACKETS $TARGET 2>/dev/null | awk '/packets received/ {print $4}'`
# If we don't have connection, change the active WAN port (If there is any loss with multiple packets, it should change either)
if [ "$RET" -ne "$PACKETS" ]; then
if [ "$USINGWAN" = "1" ]; then
/app/wan2.up
USINGWAN=2
echo "Changed active WAN port to 2!"
else
/app/wan1.up
USINGWAN=1
echo "Changed active WAN port to 2!"
fi
fi
done;
</source>
Source
