// Delete veth pair if already exists
for(i = 0; i < 2; i++) {
assert(sprintf(cmd, "ip link del %s 2>/dev/null", eth_pairs[i]) >= 0);
// Delete veth pair if already exists
for(i = 0; i < 2; i++) {
assert(sprintf(cmd, "ip link del %s 2>/dev/null", eth_pairs[i]) >= 0);