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ryancdotorg/setgw.sh

Created March 14, 2020 17:05
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Sets up routing when you don't have an on-subnet IP configured.
Raw
setgw.sh
#!/bin/sh
IFACE="$1"
SRCIP="$2"
DSTIP="$3"
MAC=`/usr/sbin/arping -r -C1 -w10 -i "$IFACE" -S "$SRCIP" "$DSTIP"`
if [ $? -eq 0 ]
then
/sbin/ip neigh replace "$DSTIP" lladdr "$MAC" dev "$IFACE" nud permanent || exit $?
/sbin/ip route replace default via "$DSTIP" dev "$IFACE" || exit $?
else
exit $?
fi
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